Watermelons

1. Scope and Applicability

This PCR covers commercial production of fresh, unprocessed watermelons from field preparation and planting through managed crop production, harvest, grading, optional washing, and farm-gate hand-off. It covers open-field and protected cultivation when the declared foreground records identify the route. Watermelon seed or transplants sold as planting material, processed or cut watermelon, cold storage after farm-gate transfer, distribution, retail, and consumption are excluded. Crop residues remain within the system only when they are returned to soil or leave the farm as a declared residue or co-product.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.agriculture-forestry-and-fishery-products.products-of-agriculture-horticulture-and-market-gardening.watermelons
classification_refs	CPC 3.0:01221 Watermelons; mapping relation: exact
covered_products	Fresh, whole, unprocessed watermelons produced for sale at the farm gate
excluded_products	Watermelon seed or transplants sold for planting, processed, cut, juiced, frozen, dried, or otherwise transformed watermelon, and post-farm-gate logistics
representative_product	Marketable whole watermelons, graded for declared size and quality and handed over at the farm gate
production_route	Annual seeded or transplanted watermelon cultivation, managed field production, harvest, grading, and farm-gate preparation
market_state	Fresh whole produce at farm gate, loose or in declared primary packaging

3. Reference Flow

Field	Value
What	Marketable fresh whole watermelon at farm gate
How much	1,000 kg
How well	Whole, fresh, unprocessed fruit meeting the declared cultivar, maturity, size, appearance, defect, and marketable-grade criteria
How long or cycle	One declared production cycle from planting through the final harvest of the crop, with the production year and harvest window reported
reference_flow_link	watermelon_farm_gate_output

Field	Value
Reference amount	1000
Reference product flow	Watermelons; production mix, at farm gate; fresh, unprocessed whole fruit 8979956d-8091-4c35-af7a-1ec80529bad3
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	farm-gate hand-off; production geography; production year and crop cycle; cultivar or seed type; irrigated or rainfed route; fruit maturity and harvest window; size and grade criteria; whole or damaged state; washed or unwashed; packaging state

When constructing a foreground data package, the items listed in Required qualifiers must be declared in dataset metadata, process notes, reference flow comment, product description, or an equivalent data package field. Missing required qualifiers make the reference flow definition incomplete for that data package.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_product_mass	harvested and farm-gate watermelon	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Keep gross harvested fruit, marketable fruit, rejected fruit, and field residue masses distinct before normalizing to the reference flow.
area_and_cycle_normalization	field production records	Area and mass	ha and kg	Record each field and crop cycle separately, then normalize all inputs and outputs to marketable farm-gate watermelon.
nutrient_basis	fertilizer inputs	Mass	kg N, kg P2O5, or kg K2O	Convert product quantities only from documented nutrient concentrations and retain the reported nutrient basis.
irrigation_volume	irrigation water	Volume	m3	Record metered or otherwise documented delivered irrigation by field and crop cycle; keep rainfall separate from irrigation withdrawals.
seed_count_or_mass	seed or transplant inputs	Number or mass	seed units or kg	Record the supplier-declared seed or transplant quantity and type; do not infer seed mass from count without a documented conversion.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Prepared agricultural field receiving watermelon seed or transplants, with prior land use, field preparation, and excluded pre-plant operations disclosed
starting_condition_role	Beginning of the declared annual watermelon crop cycle
product_classification_scope	Fresh whole watermelons under CPC 3.0:01221 through farm-gate hand-off
recursive_input_rule	Purchased watermelon seed or transplants are distinct upstream product inputs and are linked once rather than recreated as an internal watermelon production process.
upstream_dataset_requirement	Require upstream datasets for seed or transplants, fertilizers, amendments, crop-protection products, irrigation water, energy, field machinery services, and packaging when used.
disclosure	Declare production geography, prior land use, crop cycle dates, cultivar or seed type, irrigation regime, nutrient basis, crop-protection program, field emissions method, residue fate, harvest and grading method, washing, and packaging.

Boundary Rules

rule_id	Applies to	Rule	source_ids
boundary_annual_crop_cycle	field preparation through final harvest	Include field preparation, planting, crop management, and all harvests of the declared annual crop cycle; allocate shared field operations to the reported crop using documented field records.	fao-crop-production-framework; uga-watermelon-production-b996-2017
boundary_farm_gate	harvest and preparation	End the foreground boundary when marketable whole watermelon is transferred at the farm gate; include on-farm grading, trimming of damaged fruit, washing, cooling, and primary packaging only when they occur before transfer.	uga-watermelon-production-b996-2017; fao-postharvest-handling
boundary_managed_soils	fertilizer, amendment, and residue flows	Include direct and indirect managed-soil emissions attributable to applied nutrients and returned residues under one declared calculation method, without double counting emissions represented by an upstream dataset.	ipcc-2019-managed-soils
boundary_residue_fate	rejected fruit and crop residues	Record field return, composting, feed, treatment, disposal, or another declared destination for each residue stream; an unreported destination remains a data-quality gap and is not an automatic co-product.	fao-crop-residue-management; fao-postharvest-handling

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
field_preparation_and_planting	Field preparation and planting	required	once for each declared crop cycle	foreground field establishment	planted area and seed or transplant quantity
watermelon_field_management	Watermelon field management	required	throughout the declared crop cycle	foreground managed biological production	managed hectare-cycle and crop input records
harvest_and_farm_gate_preparation	Harvest and farm-gate preparation	required	each harvest and final farm-gate hand-off	foreground harvest, grading, and hand-off	1,000 kg marketable whole watermelon

Process: Field preparation and planting (field_preparation_and_planting)

Inputs

Product flows

Waste flows

Elementary flows

Occupied agricultural soil (field_occupation)

Record the field area and occupation duration for the declared crop cycle when land occupation is represented as an elementary input. Do not treat ordinary field occupation as a product input.

• Selected flow: Agricultural land occupation

• Flow property / unit: Area-time / m2*a

• Amount rule: Field area multiplied by the declared crop-cycle occupation period.

• Value mode: Calculated value (calculated_value)

• Specificity: Site-specific (site_specific) Raw activity or stage basis: per 1,000 kg marketable farm-gate watermelon.

• Normalization basis: per declared reference flow

• Basis kind: Crop cycle (crop_cycle)

• Evidence kind: Calculated from collection (calculated_from_collection)

• Collection protocol: cp_field_operation_records

Outputs

Product flows

Prepared planted field (planted_field_output)

This internal hand-off records the accepted planted area entering managed watermelon production and is not the reference product.

• Selected flow: Prepared planted watermelon field

• Flow property / unit: Area / ha

• Amount rule: Accepted planted area after planting completion and recorded failures.

• Value mode: Calculated value (calculated_value)

• Specificity: Site-specific (site_specific) Raw activity or stage basis: per planting campaign.

• Normalization basis: per declared reference flow

• Basis kind: Crop cycle (crop_cycle)

• Evidence kind: Calculated from collection (calculated_from_collection)

• Collection protocol: cp_planting_records

Waste flows

Elementary flows

Process: Watermelon field management (watermelon_field_management)

Inputs

Product flows

Urea fertilizer (watermelon_field_management_agricultural_nutrient_inputs_urea)

Collection scope and applicability for watermelon_field_management_agricultural_nutrient_inputs. The following concrete identities have separate cards and apply only when use or generation is evidenced inside the original process scope. They are not mandatory inputs or a default recipe. Document non-use; missing records are not zero. Add a separate concrete card for any other actual material instead of substituting one of these names or UUIDs. Preserve attribution and boundaries and avoid double counting components included in outsourced services.

Collect each fertilizer product separately. Preserve each actual product identity, quantity, formulation, nutrient composition, application event, and allocation; do not count a compound product more than once. Raw activity or stage basis: per 1,000 kg marketable farm-gate watermelon.

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the product UUID does not establish actual use or upstream-provider compatibility. Count physical product mass once and retain moisture, N/P/K composition and application events; nutrient quantities are calculated attributes, not additional purchases of the same product. Give unlisted compound and organic fertilizers separate cards identified by formulation or feedstock.

• Selected flow: Urea 3f8850c0-f718-4c4b-8fcb-8fd42e03aa8e
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_fertilizer_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fertilizer_records
• Sources: uga-watermelon-production-b996-2017; fao-fertilizer-identities

Use this product identity only when the actual formulation and grade are compatible. Retain supplier composition and mass records; do not substitute nutrient mass, dilute solution mass or service activity for the product mass. The UUID alone supplies neither a dose nor an emission factor.

Ammonium sulfate fertilizer (watermelon_field_management_agricultural_nutrient_inputs_ammonium_sulfate)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the product UUID does not establish actual use or upstream-provider compatibility. Count physical product mass once and retain moisture, N/P/K composition and application events; nutrient quantities are calculated attributes, not additional purchases of the same product. Give unlisted compound and organic fertilizers separate cards identified by formulation or feedstock.

• Selected flow: Ammonium sulfate 8c6f0cbb-16d7-4dc9-8d55-e8dea17d7faf
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_fertilizer_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fertilizer_records
• Sources: uga-watermelon-production-b996-2017; fao-fertilizer-identities

Use this product identity only when the actual formulation and grade are compatible. Retain supplier composition and mass records; do not substitute nutrient mass, dilute solution mass or service activity for the product mass. The UUID alone supplies neither a dose nor an emission factor.

Triple superphosphate fertilizer (watermelon_field_management_agricultural_nutrient_inputs_triple_superphosphate)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the UUID remains unverified. Count physical product mass once and retain moisture, N/P/K composition and application events; nutrient quantities are calculated attributes, not additional purchases of the same product. Give unlisted compound and organic fertilizers separate cards identified by formulation or feedstock.

• Selected flow: Triple superphosphate fertilizer
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_fertilizer_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fertilizer_records
• Sources: uga-watermelon-production-b996-2017; fao-fertilizer-identities

Potassium chloride fertilizer (watermelon_field_management_agricultural_nutrient_inputs_potassium_chloride)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the UUID remains unverified. Count physical product mass once and retain moisture, N/P/K composition and application events; nutrient quantities are calculated attributes, not additional purchases of the same product. Give unlisted compound and organic fertilizers separate cards identified by formulation or feedstock.

• Selected flow: Potassium chloride fertilizer
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_fertilizer_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fertilizer_records
• Sources: uga-watermelon-production-b996-2017; fao-fertilizer-identities

Cattle manure applied as fertilizer (watermelon_field_management_agricultural_nutrient_inputs_cattle_manure)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the UUID remains unverified. Count physical product mass once and retain moisture, N/P/K composition and application events; nutrient quantities are calculated attributes, not additional purchases of the same product. Give unlisted compound and organic fertilizers separate cards identified by formulation or feedstock.

• Selected flow: Cattle manure applied as fertilizer
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_fertilizer_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fertilizer_records
• Sources: uga-watermelon-production-b996-2017; fao-organic-nutrients

Composted plant residues applied to soil (watermelon_field_management_agricultural_nutrient_inputs_plant_compost)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the UUID remains unverified. Count physical product mass once and retain moisture, N/P/K composition and application events; nutrient quantities are calculated attributes, not additional purchases of the same product. Give unlisted compound and organic fertilizers separate cards identified by formulation or feedstock.

• Selected flow: Composted plant residues applied to soil
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_fertilizer_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fertilizer_records
• Sources: uga-watermelon-production-b996-2017; fao-organic-nutrients

Irrigation water (irrigation_water_input)

Record irrigation water delivered to the watermelon field separately from rainfall and from water used in any post-harvest washing.

• Selected flow: Irrigation water

• Flow property / unit: Volume / m3

• Amount rule: Meter delivered irrigation by field, source, and crop cycle; document estimation where meters are unavailable.

• Value mode: Foreground record (foreground_record)

• Specificity: Site-specific (site_specific) Raw activity or stage basis: per 1,000 kg marketable farm-gate watermelon.

• Normalization basis: per declared reference flow

• Basis kind: Crop cycle (crop_cycle)

• Evidence kind: Collected record (collected_record)

• Collection protocol: cp_irrigation_records

• Sources: fao-crop-evapotranspiration-56

• Range: Provisional irrigation water screen

  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 9000
  • Unit: m3/ha
  • Basis: broad first-pass irrigated or rainfed crop-cycle range pending field water records and climate assessment
  • Basis kind: Crop cycle (crop_cycle)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Electricity at the equipment supply point (field_operation_energy_electricity)

Collection scope and applicability for field_operation_energy. The following concrete identities have separate cards and apply only when use or generation is evidenced inside the original process scope. They are not mandatory inputs or a default recipe. Document non-use; missing records are not zero. Add a separate concrete card for any other actual material instead of substituting one of these names or UUIDs. Preserve attribution and boundaries and avoid double counting components included in outsourced services.

Record fuel and electricity consumed by irrigation pumps, field machinery, and other crop-management operations. Keep each carrier and operation identifiable. Raw activity or stage basis: per 1,000 kg marketable farm-gate watermelon.

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the product UUID does not establish actual use or upstream-provider compatibility. Retain the electricity supply point, fuel grade, density and heating-value basis. Distinguish purchased heat from on-site fuel conversion without counting its input fuel again.

• Selected flow: Alternating current 455f0ef5-6118-4f2b-a3f5-1f75e0afe3ca
• Flow property / unit: Energy / kWh
• Amount rule: Collect raw quantities for this identity under cp_field_operation_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_field_operation_records
• Sources: uga-watermelon-production-b996-2017; fao-agricultural-energy

This binding is alternating current at the use point with supply technology, voltage and provider unspecified. Confirm actual AC supply; DC requires a different identity. The database reference is 1 MJ: preserve meter kWh and convert once using 1 kWh = 3.6 MJ when linking reference quantities. Internal generation links to its foreground generator, without an additional purchased-electricity burden.

Diesel fuel supplied to equipment (field_operation_energy_diesel)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the product UUID does not establish actual use or upstream-provider compatibility. Retain the electricity supply point, fuel grade, density and heating-value basis. Distinguish purchased heat from on-site fuel conversion without counting its input fuel again.

• Selected flow: Diesel fuel 9d258d75-6792-4f1c-9856-81602ed8f816
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_field_operation_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_field_operation_records
• Sources: uga-watermelon-production-b996-2017; fao-agricultural-energy

Waste flows

Outputs

Product flows

Harvest-ready watermelon crop (harvest_ready_crop_output)

Record the crop output entering harvest operations before grading. This intermediate output must remain distinct from marketable farm-gate watermelon and rejected fruit.

• Selected flow: Harvest-ready watermelon crop

• Flow property / unit: Mass / kg

• Amount rule: Weigh or estimate total harvested crop entering harvest and grading, by field and harvest date.

• Value mode: Foreground record (foreground_record)

• Specificity: Site-specific (site_specific) Raw activity or stage basis: per crop cycle and per 1,000 kg marketable farm-gate watermelon.

• Normalization basis: per declared reference flow

• Basis kind: Crop cycle (crop_cycle)

• Evidence kind: Collected record (collected_record)

• Collection protocol: cp_harvest_records

Waste flows

Field crop residues (field_residue_output)

Record vines, leaves, roots, and other crop residues remaining after harvest and declare whether they are returned to soil, removed, composted, treated, or disposed.

• Selected flow: Watermelon crop residues

• Flow property / unit: Mass / kg wet residue

• Amount rule: Measure or document the residue amount and destination by field; use a documented dry-matter conversion when applicable.

• Value mode: Foreground record (foreground_record)

• Specificity: Site-specific (site_specific) Raw activity or stage basis: per crop cycle and per 1,000 kg marketable farm-gate watermelon.

• Normalization basis: per declared reference flow

• Basis kind: Crop cycle (crop_cycle)

• Evidence kind: Collected record (collected_record)

• Collection protocol: cp_residue_records

• Sources: fao-crop-residue-management

Elementary flows

Process: Harvest and farm-gate preparation (harvest_and_farm_gate_preparation)

Inputs

Product flows

Electricity at the equipment supply point (harvest_handling_energy_electricity)

Collection scope and applicability for harvest_handling_energy. The following concrete identities have separate cards and apply only when use or generation is evidenced inside the original process scope. They are not mandatory inputs or a default recipe. Document non-use; missing records are not zero. Add a separate concrete card for any other actual material instead of substituting one of these names or UUIDs. Preserve attribution and boundaries and avoid double counting components included in outsourced services.

Record energy used for harvesting, field collection, grading, washing, cooling, and primary packing when those operations occur before farm-gate transfer. Raw activity or stage basis: per 1,000 kg marketable farm-gate watermelon.

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the product UUID does not establish actual use or upstream-provider compatibility. Retain the electricity supply point, fuel grade, density and heating-value basis. Distinguish purchased heat from on-site fuel conversion without counting its input fuel again.

• Selected flow: Alternating current 455f0ef5-6118-4f2b-a3f5-1f75e0afe3ca
• Flow property / unit: Energy / kWh
• Amount rule: Collect raw quantities for this identity under cp_harvest_handling_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_handling_records
• Sources: fao-postharvest-handling; fao-agricultural-energy

This binding is alternating current at the use point with supply technology, voltage and provider unspecified. Confirm actual AC supply; DC requires a different identity. The database reference is 1 MJ: preserve meter kWh and convert once using 1 kWh = 3.6 MJ when linking reference quantities. Internal generation links to its foreground generator, without an additional purchased-electricity burden.

Diesel fuel supplied to equipment (harvest_handling_energy_diesel)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the product UUID does not establish actual use or upstream-provider compatibility. Retain the electricity supply point, fuel grade, density and heating-value basis. Distinguish purchased heat from on-site fuel conversion without counting its input fuel again.

• Selected flow: Diesel fuel 9d258d75-6792-4f1c-9856-81602ed8f816
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_harvest_handling_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_handling_records
• Sources: fao-postharvest-handling; fao-agricultural-energy

Wooden crate (primary_packaging_input_wood_crate)

Collection scope and applicability for primary_packaging_input. The following concrete identities have separate cards and apply only when use or generation is evidenced inside the original process scope. They are not mandatory inputs or a default recipe. Document non-use; missing records are not zero. Add a separate concrete card for any other actual material instead of substituting one of these names or UUIDs. Preserve attribution and boundaries and avoid double counting components included in outsourced services.

Record primary packaging that crosses the foreground boundary before farm-gate hand-off. Loose produce should be recorded as zero packaging only when this state is explicitly declared. Raw activity or stage basis: per 1,000 kg marketable farm-gate watermelon.

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the UUID remains unverified. Record composition, net mass, reuse cycles and return losses; attribute reusable items by actual use and separate packaging from product mass. Keep distinct treatment destinations separate without assuming recycling credits.

• Selected flow: Wooden crate
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_packaging_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging_records
• Sources: fao-postharvest-handling; fao-package-identities

Corrugated fibreboard box (primary_packaging_input_corrugated_box)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the UUID remains unverified. Record composition, net mass, reuse cycles and return losses; attribute reusable items by actual use and separate packaging from product mass. Keep distinct treatment destinations separate without assuming recycling credits.

• Selected flow: Corrugated fibreboard box
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_packaging_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging_records
• Sources: fao-postharvest-handling; fao-package-identities

Polyethylene wrapping film (primary_packaging_input_pe_film)

Confirm identity, grade, state and unit from equipment, supplier and contemporaneous measurements; the UUID remains unverified. Record composition, net mass, reuse cycles and return losses; attribute reusable items by actual use and separate packaging from product mass. Keep distinct treatment destinations separate without assuming recycling credits.

• Selected flow: Polyethylene wrapping film
• Flow property / unit: Mass / kg
• Amount rule: Collect raw quantities for this identity under cp_packaging_records and calculate the exchange per declared reference flow using the original attribution rules.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per declared reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging_records
• Sources: fao-postharvest-handling; fao-package-identities

Waste flows

Elementary flows

Outputs

Product flows

Marketable whole watermelon at farm gate (watermelon_farm_gate_output)

This is the PCR reference product flow. Record the marketable mass after grading and any included on-farm washing, cooling, and primary packing.

• Selected flow: Watermelons; production mix, at farm gate; fresh, unprocessed whole fruit 8979956d-8091-4c35-af7a-1ec80529bad3

• Flow property / unit: Mass / kg Raw output measurement and reconciliation: Weigh marketable whole watermelon at farm-gate transfer after the declared quality and grading checks.

• Amount rule: 1000 kg

• Value mode: Foreground record (foreground_record)

• Specificity: Site-specific (site_specific) Raw activity or stage basis: 1,000 kg marketable farm-gate watermelon.

• Normalization basis: per declared reference flow

• Basis kind: Process output (process_output)

• Evidence kind: Collected record (collected_record)

• Collection protocol: cp_harvest_records

Waste flows

Rejected or damaged watermelon (rejected_fruit_output)

Record fruit rejected during harvest or grading and identify its destination. Rejected fruit is a waste flow unless a documented productive use meets the co-product rule.

• Selected flow: Rejected or damaged watermelon

• Flow property / unit: Mass / kg

• Amount rule: Weigh or estimate rejected fruit separately from marketable output and retain the destination record.

• Value mode: Foreground record (foreground_record)

• Specificity: Site-specific (site_specific) Raw activity or stage basis: per 1,000 kg marketable farm-gate watermelon.

• Normalization basis: per declared reference flow

• Basis kind: Process output (process_output)

• Evidence kind: Collected record (collected_record)

• Collection protocol: cp_harvest_records

• Sources: fao-postharvest-handling

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_single_crop_fields	field operations assigned to one crop	Assign field operations directly to watermelon when the operation serves only the declared crop cycle; document any shared operation before applying an allocation method.	fao-crop-production-framework
allocation_multiple_outputs	marketable fruit and any documented productive residue use	Report marketable watermelon as the reference output. If a residue or other output has a documented productive use and leaves the boundary as a product, apply a declared physical or economic allocation method consistently across the shared process and disclose the allocation basis.	fao-crop-residue-management
allocation_rejects_and_losses	damaged fruit and crop residues without productive use	Treat rejected fruit and residues as waste or loss according to their declared destination. Do not allocate burdens to a waste stream as a co-product without evidence of productive use and a defined hand-off.	fao-postharvest-handling

Concrete cards do not inherit numerical ranges from the former aggregate card. Determine quantities from original records, stock/meter reconciliation and the declared reference flow; no default quantity or numeric screen is supplied without evidence matching the identity, unit, period and boundary. Missing range evidence is a quality disclosure, not zero use or proof of completeness.

rule_id	Applies to	Rule	source_ids
allocation_residual_precedence	remaining common burden with no specified primary branch	Resolve any study-specific joint-product instruction in this PCR that has no specified primary branch using this precedence; retain an already explicitly prescribed category-specific primary method. First directly assign separable output-specific activities. For the remaining common burden B, use a physical driver d_i only when measured operation or biological-service records demonstrate the causal consumption represented by that driver. A product being weighable, valuable or lower grade alone is insufficient; do not switch arbitrarily between area, time, mass and revenue. For comparable grades receiving the same common handling, measured processed mass is applicable only with the same service demand, state and moisture basis demonstrated. Share a_i=d_i/sum(d_j); B_i=Ba_i. If no defensible causal physical driver exists for that common operation, use gate- and period-matched economic shares a_i=(q_ip_i)/sum(q_j*p_j), with the complete independently intended output set, compatible quantity/price units, currency, representative prices and values before output-specific downstream processing. Missing price or denominator evidence makes the allocated result incomplete, not a zero-priced product or a single-output system. Report shares summing to one and sensitivity to a material alternative; an alternative is not an interchangeable primary result. Waste, retained residues and internal transfers receive no co-product share, while their attributable production/handling burdens remain with the producing saleable route. Retain unallocated physical quantities and mass balances separately. This branch gives no automatic substitution credit; any separately scoped substitution analysis retains the gross inventory and its actual displaced-function evidence.	ghg-protocol-product-standard-2011

8. Foreground Data Collection, Calculation, and Quality Rules

Specific input identification before dataset completion

Identify the actual input for this operation from supplier specifications, equipment and primary records. This is a mandatory collection requirement, not an exchange. Before dataset completeness, represent each used material, formulated product, carrier or independently purchased service by one physically specific card with its native quantity/property; confirm a compatible UUID, or retain an explicit unresolved identity and do not claim a fully linked dataset. Do not substitute a conditional example for an unknown actual input, invent a recipe, omit required use or infer zero from missing records. Attribute shared use, reusable assets and inclusive services once; preserve the original stage/period and measured throughput link to final reference output. The former aggregate range is not a component limit or consumption default.

requirement_id	collection_protocol_id	Preserved collection scope
crop_protection_input_specific_input	cp_crop_protection_records	Operation watermelon_field_management: Record herbicides, insecticides, fungicides, and other crop-protection products used in the declared cycle as separate product inputs with active ingredient or formulation information. Original quantity method: Product quantity from application records, with formulation and active ingredient retained.

Retain raw site, lot, cycle and stage quantities and denominators in each collection protocol. Reconcile stocks, losses, moisture and co-product attribution first, then normalize: normalized exchange = attributable raw exchange × declared reference quantity / accepted hand-off product quantity on the same boundary and measurement basis. Apply perennial-establishment and shared-operation attribution before this normalization. Never set an internal-transfer quantity equal to the final reference quantity. Per declared reference flow means the amount, unit and product state in section 3; the data package must declare its actual route and gate.

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_planting_records	field_preparation_and_planting	planting_material_input, planted_field_output	planting and field register	field_id; area; planting date; seed_or_transplant_type; supplier quantity; failures; replants	supplier records and field log reconciliation; Raw aggregation and attribution: aggregate by field, then normalize to marketable output	seed units, kg, ha	each crop cycle	full declared crop cycle	each field or homogeneous block	per declared reference flow	supplier invoice plus signed field register or equivalent
cp_field_operation_records	field_preparation_and_planting, watermelon_field_management	field_preparation_energy, field_occupation, field_operation_energy_electricity, field_operation_energy_diesel	machinery, pump, and field register	field_id; operation; date; equipment; fuel or electricity; hours; area	meter, fuel receipt, machinery log, or service record; Raw aggregation and attribution: assign shared operations by documented area or time basis field_preparation_energy_specific_input: Record diesel, electricity, or contracted machinery service used for bed preparation, tillage, laying mulch, and planting when these activities cross the foreground boundary. Report the selected energy carrier or service separately. Use fuel receipts, machinery logs, meter records, or supplier service records by field and crop cycle. Identify the actual input for this operation from supplier specifications, equipment and primary records. This is a mandatory collection requirement, not an exchange. Before dataset completeness, represent each used material, formulated product, carrier or independently purchased service by one physically specific card with its native quantity/property; confirm a compatible UUID, or retain an explicit unresolved identity and do not claim a fully linked dataset. Do not substitute a conditional example for an unknown actual input, invent a recipe, omit required use or infer zero from missing records. Attribute shared use, reusable assets and inclusive services once; preserve the original stage/period and measured throughput link to final reference output. The former aggregate range is not a component limit or consumption default.	kg, kWh, h, ha	each operation	full declared crop cycle	each field or equipment group	per declared reference flow	meter calibration, receipt, or service record
cp_fertilizer_records	watermelon_field_management	fertilizer and managed-soil emissions	nutrient application register	field_id; product; formulation; nutrient concentration; amount; date; application method; soil or climate inputs	fertilizer invoice and application log; Raw aggregation and attribution: sum by nutrient basis and field before normalization managed_soil_nitrogen_emissions_specific_emission: Calculate direct and indirect nitrogen emissions from fertilizer and relevant returned residues using the declared soil-emission method. Do not enter the same emissions both as a calculated foreground result and as an additional generic estimate. Apply the declared nitrogen-emission method to documented nutrient inputs and returned residues, with emission factors and climate or soil parameters retained. This is a mandatory emission-identification requirement, not an aggregate elementary exchange. Identify every applicable substance and actual receiving compartment separately, with compatible units, measured activity or justified calculation method, parameter applicability and uncertainty. Preserve the original operation, period, allocation and final-reference normalization. Reconcile direct and indirect pathways and upstream coverage once; do not substitute total nitrogen, total combustion emissions or a generic pollutant for a named compound. Separately document actual environmental returns, with their material and destination, if relevant. Before dataset completeness create each required specific exchange, confirm a compatible UUID or explicitly retain its unresolved identity. Missing records do not establish zero or inapplicability. ipcc-2019-managed-soils	kg product, kg nutrient	each application	full declared crop cycle	each field	per declared reference flow	invoice, label, soil test, and application record
cp_irrigation_records	watermelon_field_management	irrigation_water_input	irrigation register	field_id; source; date; meter start and end; estimated volume; rainfall context	meter or documented water-balance estimate; Raw aggregation and attribution: sum delivered volume by field and source	m3	each irrigation event or weekly	full declared crop cycle	each field and source	per declared reference flow	meter record, pump log, or water allocation record
cp_crop_protection_records	watermelon_field_management	crop_protection_input	crop-protection application register	field_id; product; formulation; active ingredient; dose; area; date; target	product label, invoice, and application log; Raw aggregation and attribution: sum by product and active ingredient crop_protection_input_specific_input: Operation watermelon_field_management: Record herbicides, insecticides, fungicides, and other crop-protection products used in the declared cycle as separate product inputs with active ingredient or formulation information. Original quantity method: Product quantity from application records, with formulation and active ingredient retained. Identify the actual input for this operation from supplier specifications, equipment and primary records. This is a mandatory collection requirement, not an exchange. Before dataset completeness, represent each used material, formulated product, carrier or independently purchased service by one physically specific card with its native quantity/property; confirm a compatible UUID, or retain an explicit unresolved identity and do not claim a fully linked dataset. Do not substitute a conditional example for an unknown actual input, invent a recipe, omit required use or infer zero from missing records. Attribute shared use, reusable assets and inclusive services once; preserve the original stage/period and measured throughput link to final reference output. The former aggregate range is not a component limit or consumption default.	kg product, kg active ingredient, ha	each application	full declared crop cycle	each field	per declared reference flow	label, invoice, and application record
cp_harvest_records	watermelon_field_management, harvest_and_farm_gate_preparation	harvest_ready_crop_output, field_residue_output, rejected_fruit_output, watermelon_farm_gate_output	harvest and grading register	field_id; harvest date; gross harvested; marketable; rejected; residue; destination; grade; transfer weight	scale tickets and harvest or grading log; Raw aggregation and attribution: reconcile gross mass to marketable, rejected, and declared residue destinations	kg	each harvest	final harvest window and full crop cycle	each field, lot, or harvest block	per declared reference flow	calibrated scale, ticket, and destination record
cp_residue_records	watermelon_field_management	field_residue_output	residue destination record	field_id; residue type; wet or dry basis; amount; destination; date	field measurement and destination confirmation; Raw aggregation and attribution: aggregate by destination and dry-matter basis where used	kg	each residue event	full declared crop cycle	each field	per declared reference flow	weigh record, compost or feed receipt, or field-return log
cp_harvest_handling_records	harvest_and_farm_gate_preparation	harvest_handling_energy_electricity, harvest_handling_energy_diesel	handling and packing register	lot_id; operation; date; energy carrier; quantity; marketable mass	meter, equipment log, or service record; Raw aggregation and attribution: assign energy to marketable mass and declare shared-service allocation	kg, kWh, h	each lot or operation	final harvest window	packing or handling site	per declared reference flow	meter or service record
cp_packaging_records	harvest_and_farm_gate_preparation	primary_packaging_input_wood_crate, primary_packaging_input_corrugated_box, primary_packaging_input_pe_film	packaging register	lot_id; material; reusable or single-use; unit count; unit mass; losses; reuse cycles	supplier specification and count or weight record; Raw aggregation and attribution: sum packaging mass and document reuse allocation	kg, item	each lot	final harvest window	packing site	per declared reference flow	supplier specification and packing record
cp_phase1_environment_coverage	field_preparation_and_planting	managed environmental coverage by actual node	site/activity/method ledger	actual production nodes; soil/substrate route; climate/soil; nutrient product mass and composition; residue fate/N; relevant mineralisation/organic-soil/excreta activity; method/tier/equation/version; pathway factors and units; lime/urea; actual fuels; substance/compartment; supplier coverage	Collect original records by the actual responsible production node and matched lot/period; retain provenance, method applicability and uncertainty. Reconcile with existing protocols and provider coverage, do not add duplicate events. Explicitly document inapplicability; absent evidence is a gap.	native activity units; kg N or substance; area/time as applicable	event and annual/lot reconciliation	matched production/cohort period	all actual managed-production nodes	apply applicable coverage calculations then final normalization once	original records, method worksheets and applicability evidence

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	all inventory rows	normalized amount = field or lot amount × 1,000 kg / marketable farm-gate watermelon mass	field or lot record; marketable mass	amount per 1,000 kg reference flow
calc_nutrient_mass	fertilizer inputs	nutrient mass = product mass × declared nutrient concentration	product mass; label or supplier concentration	kg N, kg P2O5, or kg K2O	uga-watermelon-production-b996-2017
calc_land_occupation	field occupation	occupation = field area × declared crop-cycle occupation duration	field area; planting and final harvest dates	m2*a or declared area-time unit
calc_managed_soil_emissions	managed-soil nitrogen emissions	Apply one declared IPCC-compatible method to documented nutrient inputs and returned residues; retain factors and assumptions with the dataset.	nutrient inputs; residue return; soil and climate parameters	elementary nitrogen emissions per reference flow	ipcc-2019-managed-soils
calc_mass_balance	harvest and grading	gross harvested = marketable + rejected + documented other destinations, subject to scale precision and declared estimation uncertainty	harvest, grading, and destination records	reconciled crop output and loss record	fao-postharvest-handling
calc_reusable_packaging	reusable primary packaging	Allocate packaging manufacture and loss to the declared number of use cycles using supplier or operator records; do not apply reuse credit without a documented cycle count.	packaging mass; use cycles; loss rate	packaging mass per reference flow	fao-postharvest-handling
planting_material_input_identity_and_fate	field_preparation_and_planting	For the original planting_material_input collection role at this operation, identify the actual physical form, species/material, composition, state and supply/treatment boundary before creating exchanges. Each seed lot, transplant, crown, cutting, larval stage, formulation, coating, preservative or separated residue actually used/generated requires its own concrete card where relevant to this role; these examples are alternatives, not a required recipe. Retain existing collection records and route-specific source evidence. Count-based planting records require measured or supplier-supported mass-per-unit when matched to a mass-based provider; retain count and mass as linked attributes rather than two purchases. Do not merge separate husk/shell or separate agents. A real mixed stream requires composition and recipient evidence and is counted once. Before completeness, record every applicable amount and native unit, link a compatible verified UUID or explicitly unresolved identity, preserve stock/return attribution, and normalize the attributable raw quantity once to the accepted reference output. Missing records are not zero; aggregate ranges are not individual-input defaults.	cp_planting_records	Identity-specific exchanges and reconciled activity records	uga-watermelon-production-b996-2017

Environmental Coverage Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_managed_environment_coverage	actual managed-production nodes	For the actual owned managed-production node(s), require an applicability ledger for direct soil N2O, volatilisation/deposition-derived indirect N2O, leaching/runoff-derived indirect N2O, NH3/NOx and nutrient losses, plus actual liming/urea-use CO2. Primary calculation precedence is a representative pathway measurement, then a validated site/national method applicable to the crop, soil and management; otherwise use the compatible 2006 IPCC/2019-refined managed-soil equations and climate/input-specific factor selection for N2O and lime/urea CO2. Retain the exact edition, equation, tier, activity and factor units, climate and management applicability; no universal dose or emission factor is prescribed. Non-soil/protected routes need a method valid for their actual medium; do not force soil factors onto an inapplicable route. Use the same period/field N ledger for synthetic and organic additions, residues, actual relevant mineralisation/organic-soil and excreta pathways; demonstrate absent pathways rather than infer zero. Calculate direct and each indirect component separately, then assign each once to matching existing or new concrete cards; never add a total to its components. Convert N2O-N to molecular N2O by 44/28 once. NH3, NOx and nutrient/pesticide loss require an applicable measured or documented substance/fate model; total N/P or an unexplained balance residual is not a compound release. Keep actual receiving compartments and molecular versus elemental/reporting bases explicit; indirect formation does not remove the same N from the source ledger twice. Include actual local combustion releases separately using fuel-specific combustion-only methods; purchased electricity/heat/services retain upstream coverage once. Add one identity-specific exchange only for a supported release and reuse an existing matching card, with verified UUID or explicit unresolved identity. Missing applicable method/activity/factor/identity blocks completeness; it is not a justified zero. Attribute raw activity/release totals and normalize once to the matched accepted reference output.	cp_phase1_environment_coverage	attributed native environmental quantities per matched final reference	review-ipcc-soils-2019

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference and output flows	Declare cultivar or seed type, production geography, crop-cycle dates, harvest window, whole-fruit state, grade, and farm-gate hand-off.	product and field register
dq_mass_reconciliation	harvest, rejects, residues, and reference output	Reconcile gross harvested mass to marketable output, rejected fruit, residues, and other declared destinations within the stated scale or estimation uncertainty.	scale tickets and destination records
dq_input_completeness	all product and elementary inputs	Account for seed or transplants, fertilizer nutrients, irrigation, crop-protection products, field energy, land occupation, soil emissions, and included handling inputs; disclose unavailable records.	input registers and completeness checklist
dq_temporal_geographic_scope	all foreground records	Cover the complete declared crop cycle and identify field, production geography, production year, irrigation regime, and any protected-cultivation route.	field register and production metadata
dq_residue_destination	crop residues and rejected fruit	Retain a destination and quantity for each residue stream; identify field return, feed, composting, treatment, disposal, or other documented use.	residue and destination records
dq_uncertainty_disclosure	estimated or calculated values	Mark estimates, conversion factors, and missing measurements, and state the effect on the normalized reference flow.	calculation sheet and quality review

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference_flow	reference product	Reference amount is 1,000 kg mass of whole, marketable watermelon at farm gate and carries all required qualifiers.
validate_cycle_completeness	process map and records	Field preparation, planting, managed production, harvest, and farm-gate hand-off are present for the declared annual crop cycle, with conditional operations explicitly marked.	fao-crop-production-framework
validate_mass_balance	harvest and grading	Gross harvested, marketable, rejected, residue, and other destination masses are reconciled and do not double count the reference output.	fao-postharvest-handling
validate_nutrient_and_water_basis	fertilizer and irrigation	Fertilizer inputs retain nutrient basis and concentration evidence; irrigation volume identifies source and field and is not conflated with rainfall.	fao-crop-evapotranspiration-56
validate_residue_and_loss_fate	rejected fruit and residues	Every non-marketable stream has a declared destination or an explicit data-quality finding; waste is not treated as a co-product without documented productive use.	fao-crop-residue-management
validate_boundary_disclosure	dataset metadata	Prior land use, crop cycle, production geography, irrigation regime, soil-emission method, residue fate, and all included farm-gate operations are disclosed.	fao-crop-production-framework; ipcc-2019-managed-soils
validate_normalization	all inventory rows	All amounts can be traced to field, crop-cycle, harvest, or lot records and normalize to 1,000 kg marketable farm-gate output.

10. Published Dataset Profile

Field	Value
dataset_role	Primary foreground agricultural production dataset for fresh whole watermelon at farm gate
downstream_use	secondary_dataset; may supply a background_dataset when the documented farm-gate product and quality qualifiers match
allowed_use	LCA modelling of fresh whole watermelon production through the declared farm-gate hand-off and included on-farm preparation
excluded_use	Processed or cut watermelon, seed or transplant production, post-farm-gate storage and distribution, retail, consumption, or unreported crop routes
required_metadata	production geography; production year; crop-cycle dates; cultivar or seed type; field area; irrigated or rainfed route; farm-gate state; grade; washing and packaging state; residue destinations
required_quality_disclosure	mass reconciliation; input completeness; nutrient and irrigation basis; soil-emission method; residue and reject fate; estimated values; temporal and geographic coverage
update_trigger	material change in cultivation route, irrigation or nutrient practice, crop-protection regime, farm-gate preparation, packaging, classification scope, or evidence supporting quantitative rules

11. Data Sources

source_id	type	reference	used_for
fao-crop-production-framework	official_guidance	FAO crop production and resource-management guidance. https://www.fao.org/land-water/databases-and-software/crop-information/en/	annual crop-cycle boundary, field records, and allocation requirements
uga-watermelon-production-b996-2017	extension_guidance	University of Georgia Cooperative Extension, Commercial Watermelon Production, Bulletin 996 (2017), https://fieldreport.caes.uga.edu/publications/B996/commercial-watermelon-production/	Georgia planting, nutrient management, field operations and harvest context; PCR boundary and allocation are author methodological choices
fao-crop-evapotranspiration-56	official_guidance	FAO Irrigation and drainage paper 56, Crop evapotranspiration. https://www.fao.org/4/X0490E/X0490E00.htm	crop water-balance and irrigation-record methods
ipcc-2019-managed-soils	method_factor	2019 IPCC Refinement, Agriculture, Forestry and Other Land Use, managed-soils methodology. https://www.ipcc-nggip.iges.or.jp/public/2019rf/vol4.html	managed-soil nitrogen-emission method
fao-crop-residue-management	official_guidance	FAO crop-residue and soil-management guidance. https://www.fao.org/3/y2779e/y2779e00.htm	residue return and destination disclosure
fao-postharvest-handling	official_guidance	FAO post-harvest handling guidance. https://www.fao.org/4/ac301e/ac301e00.htm	grading, loss recording, packaging, and farm-gate preparation
fao-fertilizer-identities	official_guidance	FAO Fertilizer Specifications, https://www.fao.org/agriculture/crops/thematic-sitemap/theme/spi/plantnutrition/fertspecs/en/	conditional concrete identities and method context; does not establish site use or quantities
fao-organic-nutrients	official_guidance	FAO How to Make and Use Compost, https://www.fao.org/4/i2230e/i2230e.pdf	conditional concrete identities and method context; does not establish site use or quantities
fao-agricultural-energy	official_guidance	FAO Energy demand and consumption in African agriculture, Annex C case-study results, https://www.fao.org/4/v9766e/v9766e08.htm	conditional concrete identities and method context; does not establish site use or quantities
fao-package-identities	official_guidance	FAO Packaging for fruits, vegetables and root crops, section 4, https://www.fao.org/4/x5016e/X5016E04.htm	conditional concrete identities and method context; does not establish site use or quantities
ghg-protocol-product-standard-2011	standard	WRI/WBCSD, Product Life Cycle Accounting and Reporting Standard (2011), Chapter 9, https://ghgprotocol.org/sites/default/files/standards/Product-Life-Cycle-Accounting-Reporting-Standard_041613.pdf	General allocation hierarchy and comparable-gate economic basis. Applicability conditions and the explicit residual branch are this PCR's method convention; no product-specific causal coefficient, price or output quantity is prescribed by this source.
review-ipcc-soils-2019	official_guidance	IPCC 2019 Refinement, Volume 4, Chapter 11, https://www.ipcc-nggip.iges.or.jp/public/2019rf/pdf/4_Volume4/19R_V4_Ch11_Soils_N2O_CO2.pdf	Managed-soil direct/indirect N2O and lime/urea CO2 method context; factors require actual applicability and site activity, not a product default.