Live chickens at producing farm gate

1. Scope and Applicability

This PCR produces foreground data for live domestic chickens handed over at the producing farm gate. It covers broiler, breeder, replacement and layer birds when transferred alive, including purchased starting birds, managed rearing or laying periods, feed, water, housing, litter and manure management, animal health, mortality, selection, live weighing and farm-gate handover. Free-range and housed systems are route variants of managed chicken production; record their distinct land access, feed sourcing, housing, litter, energy and manure pathways.

Hatching eggs, fresh table eggs, meat and carcasses are separate reference products. Eggs or manure become co-products here only when independently intended and transferred from the same declared system. Mortalities, rejected eggs and unusable litter are losses or wastes. Slaughter, dressing, off-farm processing and post-transfer transport are outside this farm-gate boundary.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.agriculture-forestry-and-fishery-products.live-animals-and-animal-products-excluding-meat.chickens
classification_refs	CPC 3.0 02151, Chickens
covered_products	live chickens transferred from a producing farm, including broiler, breeder, replacement, layer and spent birds when alive
excluded_products	hatching or table eggs as reference products; chicken meat, carcasses and slaughter output; birds after post-farm transport; other poultry species
representative_product	live chicken weighed just before ownership or operational control transfers at the producing farm gate
production_route	managed flock production parent with broiler, breeder or layer purpose and housed or free-range implementation; each route declares changed feed, housing, litter, manure, energy, duration and validation requirements
market_state	live unprocessed chicken with declared purpose, class, age or phase, health or market condition, geographic origin and farm-gate handover

Route variants may coexist within one enterprise, but their flock, housing, feed, manure and output records must remain separable. A layer route that also reports eggs must declare whether the egg burden is attributed here or in a separate egg dataset; one egg output is never counted in both.

3. Reference Flow

Field	Value
What	live chicken at the producing farm gate
How much	1 kg measured live weight
How well	purpose and class; breed or genetic line where material; rearing or laying route; age or phase; health and market state; geography; scale and gut-fill or shrink convention
How long or cycle	declared flock cohort and reporting period, covering attributed replacement, brooding, growing or laying, selection and handover phases
reference_flow_link	live_chicken_output

Field	Value
Reference amount	1
Reference product flow	Live chicken at producing farm gate
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	live weight; head count; purpose and class; route; cohort and reporting period; farm-gate handover; geography; mortality; breeding or replacement phase; egg co-output decision

The generic reference flow UUID remains unresolved. A farm-live candidate uses Number of items rather than Mass, another Mass candidate is China-specific, and a third is feed-grade at plant. Head count is mandatory supporting activity data but does not substitute for the 1 kg Mass reference.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_live_mass	reference output	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Sum weighed live birds crossing the farm gate; preserve weigh date, sampling, class and shrink convention before normalizing to 1 kg.
bird_count_mass	bird admission, mortality and sale	Mass and count	kg and head	Link head counts to measured or sampled class-specific live mass; never convert count using a universal weight.
feed_dry_matter	feed and litter	Mass	kg as-fed and kg dry matter	Preserve moisture, issued quantity, returns and stock change; convert as-fed to dry matter only from recorded composition.
water_and_energy	supplied water and energy	Volume or Mass; energy or carrier quantity	m3 or kg; kWh, MJ, L or kg	Keep water function, energy carrier and original unit separate before any conversion or shared-meter allocation.
species_emissions	manure-system emissions	Substance mass	kg CH4, kg N2O, kg NH3	Calculate each species separately from declared flock category, manure path, activity data and method tier; do not collapse them into a generic gas mass.
inventory_reference_normalization	all inventory rows	Actual flow property	exchange unit per reference flow	The inventory and collection aggregation fields below express final amounts per declared reference flow. Keep all raw collection records, original denominator qualifiers, route/period strata, unit conversions and allocation requirements. For each flow, first obtain its attributable amount in its own numerator unit using the existing rules; then divide by the measured accepted reference-output quantity of the same scope and multiply by the declared reference quantity. Do not mix species, states, gates or incompatible routes; count transfers and shared burdens once. A missing, zero or untraceable accepted-output denominator is a blocking data-quality issue. Keep provisional QA ranges on their explicitly stated bases; they are not conversion factors or production defaults. Compute normalized amount = attributable amount * declared reference quantity / measured accepted reference-output quantity. Apply normalization once only; never divide an already normalized value again.
stage_throughput_linkage	stage records and final package contributions	Actual flow property and its stated raw basis	retain native numerator and stage denominator units	Keep the original lot, event, cohort, period and stage denominators with their units. Reconstruct the attributable numerator A with measured stage quantity Q_stage and documented attribution before final normalization. If a quoted amount a_B corresponds to an explicit stage basis B_stage (for example, 1000 kg), use A = a_B * Q_stage / B_stage. If r_stage is already an intensity in exchange-unit per stage-unit, instead use A = r_stage * Q_stage, with no second division by B_stage. A raw attributable total is used directly. Final contribution = A * declared reference quantity / measured accepted final output. Convert compatible units explicitly and apply each attribution/allocation share exactly once; never treat a quoted amount or intensity as a raw total. Link stage transfers, losses, rejects, stocks, shared services and allocation to the same actual route, period and final-output stratum. For a 1000 kg basis retain 1000 kg explicitly. Do not assume unit yield, equal fresh/dried mass, equal head mass, equal dose quality or interchangeable gates. Missing links, unsupported unit conversion, zero denominators and untraceable allocation block dataset production. Stage-native datasets retain their own stage reference; package contributions are a separate projection.

5. System Boundary

Foreground starts with admitted chicks, pullets or other starting birds and the declared housing and land state. It includes controlled breeding or brooding when present, growing or laying, feed and water provision, animal health, ventilation and heat, controlled manure and litter handling, flock selection and live weighing through the producing-farm gate. Feed production, purchased-bird rearing, supplied energy, medicines and off-farm services require linked upstream datasets unless actually operated within the declared foreground. Directly controlled inbound movement is included only if not already in supplier delivery.

Boundary Abstraction

Field	Value
declared_starting_condition	admitted flock by class, age, live mass, head count, source and opening period, with declared housing and litter state
starting_condition_role	biological starting stock and shared housing state whose prior burdens must be linked or explicitly attributed by period
product_classification_scope	CPC 3.0 02151, live chickens; eggs, meat and other poultry are separate categories
recursive_input_rule	purchased or internally transferred live chickens are starting-stock inputs with source, mass, count, phase, date and prior burden; they are not silently recreated as farm-gate output
upstream_dataset_requirement	supplier or prior-phase datasets for birds, feed, bedding, health products, energy and services; any missing compatible dataset requires a disclosed gap and replacement plan
disclosure	flock purpose and class, route, site, housing and range access, feed basis, manure path, mortality, egg output, shared assets, phase and period, live-weight method, output handovers and unresolved identities

Boundary Rules

rule_id	Applies to	Rule	source_ids
b_managed_flock	all routes	Model one managed flock parent; declare broiler, breeder, layer, housed or free-range changes in topology, feed, housing, litter, manure, energy, duration and validation from actual route records.	fao-leap-poultry-2016
b_farm_gate	live chicken reference	Stop at live-weight measurement and transfer at the producing farm gate; exclude slaughter, dressing and downstream transport.	fao-leap-poultry-2016
b_phase_links	replacement, brooding, growing, laying and spent-bird phases	Link admission, inputs, shared assets, mortality, eggs and live-bird output to cohort and period; attribute opening-stock burdens once.	fao-leap-poultry-2016
b_manure_route	manure and litter	Include controlled collection, storage, treatment and land use; record exported product or waste at actual handover and exclude off-farm treatment from the farm foreground unless controlled.	ipcc-2019-livestock-manure; fao-leap-nutrient-flows-2018
b_shared_housing	poultry house, range, water, energy and manure facilities	Identify all flock classes and service periods consuming each shared asset, including egg and live-bird nodes; assign its burden once on measured service.	fao-leap-poultry-2016

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
flock_production	Flock husbandry and farm-gate handover	required	Declare actual broiler, breeder, layer, free-range or housed route and output set.	Managed biological production, manure responsibility, output selection and live-weight gate.	kg live chicken handed over, with head count and cohort-period reconciliation

Process: Flock husbandry and farm-gate handover (flock_production)

Inputs

Product flows

Admitted chicks, pullets or other live starting birds (starting_birds)

Record all birds admitted from an earlier phase or supplier, with class, origin, count, measured or sampled live mass, date and inherited burden.

Denominator and scope requirements：per kg live chicken at farm gate, with cohort-period index

• Selected flow: Live starting chickens
• Flow property / unit: Mass and supporting count / kg and head
• Amount rule: admitted live mass and count by flock and period
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bird_events
• Sources: fao-leap-poultry-2016
• Range: Provisional admitted-bird mass screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 3
  • Unit: kg admitted live mass/kg live reference output
  • Basis: broad first-pass screen; zero is possible for fully farm-born cohorts
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Supplied drinking and husbandry water (water_input)

Record supplied drinking, cleaning and cooling water by purpose and source. This conditional umbrella is expanded to concrete exchanges from foreground use records.

Denominator and scope requirements：per kg live chicken at farm gate

• Selected flow: Water supply for flock operations
• Flow property / unit: Volume or Mass / m3 or kg
• Amount rule: Measure the actual supplied-water quantity crossing this product-supply boundary by event/use and matched period, in its declared native unit. A source-abstraction meter is not automatically the delivered-product quantity: reconcile distribution losses, external returns and storage change between the two measurement points. Direct natural abstraction owned by the foreground requires a separate source-specific elementary input and local supply operations; the internal delivery then cancels inside the aggregate boundary, rather than adding a second external water purchase. Purchased water inherits its compatible provider abstraction and supply burdens once. Retain rainfed/no-supply absence evidence; missing delivery/ownership evidence is incomplete, not zero. Attribute and normalize once to accepted final output.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_energy
• Sources: fao-leap-water-livestock-2019
• Range: Provisional supplied-water screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: m3/kg live reference output
  • Basis: broad water-use screen; retain actual purpose and source
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Alternating current (energy_input_electricity)

Actual electrically driven ventilation, lighting, water pumping and feeding in the flock service period. Brooding/heating remains mandatory to investigate, but its fuel or purchased-heat specification must come from the actual heater and supplier.

Activate only for documented alternating-current consumption at this node. The identity leaves voltage, technology and provider unspecified; record them and select compatible upstream supply. Preserve measured kWh and convert exactly to MJ using 1 kWh = 3.6 MJ; do not interpret electric energy as combustion fuel or useful heat.

• Selected flow: Alternating current 455f0ef5-6118-4f2b-a3f5-1f75e0afe3ca
• Flow property / unit: Energy (database reference property: net calorific value) 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ
• Amount rule: Collect only this carrier quantity attributable to this node under cp_water_energy. Reconcile inclusive services and shared use once; scale the attributed quantity by the declared reference amount divided by matched accepted final output quantity in the same product unit. Preserve process-native throughput records; do not renormalize a final-reference amount.
• Value mode: calculated_value
• Specificity: site_specific
• Normalization basis: per declared reference flow
• Basis kind: reference_flow
• Evidence kind: calculated_from_collection
• Collection protocol: cp_water_energy
• Sources: route-energy-fao

Apply energy_input_identification in Section 8. No numerical range or default is inherited from the former aggregate card.

Controlled inbound freight service (inbound_transport)

Record only an actual road-freight inbound service under farm control for birds, feed or materials. Supplier-delivered logistics already included upstream is excluded. A non-road service needs its own verified exchange outside this road-group card.

Denominator and scope requirements：per kg live chicken at farm gate

• Selected flow: Inbound road freight service
• Flow property / unit: Goods transport / t*km
• Amount rule: delivered mass multiplied by controlled road distance
• Value mode: Calculated value (calculated_value)
• Specificity: Route-specific (route_specific)
• Normalization basis: per reference flow
• Basis kind: Transport service (transport_service)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_inbound_transport
• Range: Provisional inbound transport screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 10
  • Unit: t*km/kg live reference output
  • Basis: broad route screen; zero when all inbound transport is supplier-delivered
  • Basis kind: Transport service (transport_service)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

No purchased waste input is assumed. Any imported manure or litter substrate is a separately identified product or waste input with origin, treatment status and contamination evidence, and requires a documented route decision before inclusion.

Elementary flows

Record direct land occupation or water abstraction only when measured under the foreground boundary; these are not inferred from access to a range or from purchased water.

Outputs

Product flows

Live chickens handed over at farm gate (live_chicken_output)

Record only birds alive at the point of transfer. Reconcile sold or transferred mass and count with admission, growth and mortality records.

Raw reference-output records: measured kg live chicken handed over by class and cohort Preserve the measured accepted lot quantity and every required qualifier. The amount below is the normalized reference exchange, not an assertion that a physical lot contains only one unit.

Denominator and scope requirements：per reference flow

• Selected flow: Live chicken at producing farm gate
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: 1 kg
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bird_events
• Sources: fao-leap-poultry-2016
• Range: Reference mass identity
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg reference output
  • Basis: definition of the 1 kg reference flow
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Method formula (method_formula)
  • Sources: fao-leap-poultry-2016

Independently transferred hatching or table eggs (egg_coproduct)

Include only eggs that leave the same managed system as intended products. Record egg class, shell-on mass, count and farm-gate handover; a separately modelled egg PCR must receive the attributed burden once.

Denominator and scope requirements：per kg live chicken output and declared output set

• Selected flow: Hatching or table eggs by actual product identity
• Flow property / unit: Mass and count / kg shell-on and item
• Amount rule: measured saleable eggs handed over by category and cohort-period
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_output_handover
• Sources: fao-leap-poultry-2016
• Range: Provisional egg co-output screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 100
  • Unit: kg eggs/kg live reference output
  • Basis: broad layer-lifetime screen; zero for non-laying routes
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Dead birds and non-saleable carcasses (mortality_waste)

Record deaths, count and recovered mass by phase, and route to on-farm treatment or off-farm handover. Do not add dead birds to live reference output.

Denominator and scope requirements：per kg live chicken output

• Selected flow: Poultry mortality waste by actual disposal route
• Flow property / unit: Mass and count / kg and head
• Amount rule: measured or class-weight-estimated dead-bird mass by event
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_bird_events
• Range: Provisional mortality screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 2
  • Unit: kg dead-bird mass/kg live reference output
  • Basis: broad cohort screen, replaced by actual deaths and class mass
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Biogenic methane from controlled manure pathway (manure_methane_air)

Include only where the declared manure system and method generate CH4. Do not infer an enteric methane pathway for poultry.

Denominator and scope requirements：per kg live chicken output

• Selected flow: Methane, biogenic, to air fe0acd60-3ddc-11dd-a8e8-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg CH4
• Amount rule: manure-system-specific CH4 calculated from measured volatile solids and documented factor tier
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_manure_records
• Sources: ipcc-2019-livestock-manure
• Range: Provisional manure-methane screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg CH4/kg live reference output
  • Basis: broad conditional screen; actual value uses declared manure path and factor
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Nitrous oxide from controlled manure management (manure_n2o_air)

Calculate direct and attributable indirect N2O by the documented manure and nitrogen pathway; avoid duplicating downstream land application emissions.

Coverage of this single N2O card: use calc_manure_n2o_coverage to calculate direct and applicable indirect components separately for the represented node, then report only their non-overlapping molecular-N2O sum assigned to this card. Keep storage and managed-soil calculations distinct. Exclude components explicitly covered by a linked process, retain the coverage evidence, and do not duplicate them as both aggregate and component exchanges. Missing indirect-pathway evidence is not zero.

Denominator and scope requirements：per kg live chicken output

• Selected flow: Nitrous oxide to air 08a91e70-3ddc-11dd-94c3-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg N2O
• Amount rule: pathway-specific N2O from measured manure nitrogen and documented factor tier
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_manure_records
• Sources: ipcc-2019-livestock-manure
• Range: Provisional manure-nitrous-oxide screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg N2O/kg live reference output
  • Basis: broad conditional screen; actual value uses N pathway and factor
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Ammonia from controlled manure and litter (manure_nh3_air)

Record ammonia as NH3 species mass to air where a declared housing, storage or treatment pathway emits it.

Denominator and scope requirements：per kg live chicken output

• Selected flow: Ammonia to air 08a91e70-3ddc-11dd-a2a9-0050c2490048
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg NH3
• Amount rule: pathway-specific NH3 from measured manure nitrogen and documented method
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_manure_records
• Sources: fao-leap-nutrient-flows-2018; ipcc-2019-livestock-manure
• Range: Provisional manure-ammonia screen
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg NH3/kg live reference output
  • Basis: broad conditional screen; actual value uses recorded N and method
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
a_output_set	live birds, eggs and exported manure	Enumerate every independently intended output and actual handover. Keep losses and waste outside the intended output set; separate hatching from table eggs and product manure from residue.	fao-leap-poultry-2016; fao-leap-nutrient-flows-2018
a_physical_then_economic	unavoidable shared output burdens	First separate measured process or phase burdens. Where a remaining shared burden cannot be subdivided physically, declare a documented physical causal basis if credible; otherwise use period-specific economic shares with disclosed prices and sensitivity. Never credit a co-product and allocate the same burden again.	fao-leap-poultry-2016
a_phase	breeder, broiler, layer and replacement periods	Attribute starting stock, replacement, rearing, laying, culling and termination burdens to their actual cohorts and outputs. State the period decision explicitly, including an opening-stock reconciliation and no duplicate allocation to a separate egg PCR.	fao-leap-poultry-2016
a_shared_assets	housing, equipment, water, energy and manure systems	Enumerate all consuming flock classes, output nodes and service periods. Allocate each asset once using recorded occupied area-time, equipment hours, meter use or another measured service basis; disclose a fallback and test total assigned share equals 100%.	fao-leap-poultry-2016

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
feed_input_specific_input	cp_feed_records	Operation flock_production: Include feed issued to the flock, including pasture or scavenged intake when estimated from recorded access and performance; preserve product identity, as-fed mass, dry matter and diet phase. Denominator and scope requirements：per kg live chicken at farm gate and allocated cohort-period Original quantity method: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using reconciled feed-supply records that retain in-boundary losses and their production burden.

Route-specific energy identification requirements

Select energy exchanges from the actual product state, operation, equipment and supply records. The conditional cards below are not a mandatory or exhaustive fuel list. For each requirement, document applicability and the used carrier, supplier, service period, native quantity and allocation; add a separate physically specific card and verify its UUID for any actual input not yet represented. An unidentified input remains an explicit completeness gap, never a zero or a generic energy exchange. Evidence of manual work, ambient drying or a bypass can justify non-use only for the affected operation. Preserve every required operation even when no example card is supplied.

Separate purchased supply from on-site conversion. Link self-generated electricity internally to the foreground generator and count its actual fuel and emissions there once; do not also charge a purchased-electricity supply for the same internal transfer. Likewise do not count supplier-side fuel again with purchased heat. Reconcile shared meters and contractor-included energy against existing cards, with one physical quantity assigned once. Retain source quantities, output throughput, shared-service allocation and excluded post-gate activities. For each carrier, apply period/output attribution once and scale to the declared reference quantity using matched accepted final output in the same product unit; do not normalize an already normalized amount again. Process-native intensities require a measured throughput link to that final output. These requirements do not set a consumption default or certify dataset completeness.

requirement_id	collection_protocol_id	Required operation and evidence
energy_input_identification	cp_water_energy	Actual electrically driven ventilation, lighting, water pumping and feeding in the flock service period. Brooding/heating remains mandatory to investigate, but its fuel or purchased-heat specification must come from the actual heater and supplier. Denominator and scope requirements：per kg live chicken at farm gate (route-energy-fao)

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_bird_events	flock_production	admitted birds, deaths and live handover	flock log and weighbridge record	event date, class, purpose, head count, weight, scale, phase, supplier or destination	direct counts and calibrated scale or documented sample; Raw aggregation requirements: sum by class-period; estimate missing class mass only from sampled birds. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.	head; kg	each event	full declared cohort and reporting period	each house, flock and farm gate	per reference flow	signed transfer records, scale calibration and flock reconciliation; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_feed_records	flock_production	feed and range intake	inventory, ration and range log	product, batch, as-fed mass, dry matter, issued, returned, stock change, flock, access period	invoices, bin scale and ration or range intake calculation; Raw aggregation requirements: Use calc_feed_supply_and_intake to distinguish supplied feed carrying production burden, actual intake and losses; preserve all native stock and period records, then normalize the attributable quantity once to accepted final output. feed_input_specific_input: Operation flock_production: Include feed issued to the flock, including pasture or scavenged intake when estimated from recorded access and performance; preserve product identity, as-fed mass, dry matter and diet phase. Denominator and scope requirements：per kg live chicken at farm gate and allocated cohort-period Original quantity method: Calculate the attributable final-package exchange under inventory_reference_normalization and stage_throughput_linkage using reconciled feed-supply records that retain in-boundary losses and their production burden. 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; kg dry matter	delivery and feeding period	all active flock phases	each ration and flock	per reference flow	invoices, recipe, moisture assay and stock reconciliation; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_water_energy	flock_production	supplied water and energy	meter and invoice	purpose, source, meter, carrier, amount, unit, period, users ; actual supply boundary and meter location; product delivery; direct-abstraction owner; source-to-delivery losses, returns and storage; provider coverage	read meter or validated invoice; record allocation key; Raw aggregation requirements: assign by measured service and reconcile to bill. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again. Route-specific requirements: energy_input_identification: Actual electrically driven ventilation, lighting, water pumping and feeding in the flock service period. Brooding/heating remains mandatory to investigate, but its fuel or purchased-heat specification must come from the actual heater and supplier. Denominator and scope requirements：per kg live chicken at farm gate (route-energy-fao) Verify actual use, equipment and supply for each applicable input; create one specific exchange per actual carrier before dataset completeness. Missing identity or quantity evidence remains unresolved, never zero. Distinguish purchased supply, internal generation and inclusive contractor services; count their energy once. Do not substitute the conditional examples for an unverified route.	m3; kg; kWh; MJ; L	meter interval	full cohort period	every source, house and shared utility	per reference flow	meter reading, bill and shared-use schedule; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_materials_health	flock_production	bedding and animal-health products	use and treatment register	item, dose or mass, unit, batch, treated birds, date, stocks	physical stock and treatment records; Raw aggregation requirements: net use by product and phase. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again. husbandry_material_input_specific_input: Inventory each bedding, disinfectant, vaccine, medicine and other physical husbandry product separately in the concrete dataset; do not equate a dose with mass. Denominator and scope requirements：per kg live chicken at farm gate measured purchase, use and stock change by item and flock 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; L; dose; item	use event	full cohort period	each flock and storage area	per reference flow	stock count, treatment log and invoice; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_inbound_transport	flock_production	controlled freight	trip record	cargo identity, mass, origin, destination, mode, distance, provider, delivery terms	route and delivery docket; Raw aggregation requirements: mass times distance, excluding supplier-included legs. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.	t; km; t*km	each trip	full cohort period	controlled inbound legs	per reference flow	delivery note, route evidence and invoice; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_output_handover	flock_production	eggs and other intended output	egg grading and transfer record	output class, shell-on mass, count, grade, rejects, date, buyer	scale, count and dispatch docket; Raw aggregation requirements: saleable mass by category-period; exclude rejects. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again.	kg; item	each collection and dispatch	relevant laying periods	each layer flock and handover	per reference flow	grading log, scale and receipt; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_manure_records	flock_production	manure, litter, waste and species emissions	manure path and treatment log	flock class, housing, bedding, N, volatile solids, wet and dry mass, storage, export, treatment, factor tier	sampling, weighing, log and documented factor method; Raw aggregation requirements: close wet/dry mass and nitrogen balance, then calculate pathway species. Apply the existing route, period, conversion and allocation rules; retain raw totals and the measured accepted reference-output denominator for the same scope. Perform final normalization exactly once; do not divide an already normalized amount again. manure_product_specific_output: Count as a product only if an identified buyer or receiving process accepts it for a documented beneficial use. Otherwise use the waste card. Denominator and scope requirements：per kg live chicken output measured transferred mass and composition at product handover This is a mandatory output-identification requirement, not an aggregate exchange. Preserve every actual co-product, reject, packaging waste and treatment stream in this operation. Before dataset completeness create separate cards for physically distinct streams, with actual material/state, quantity, destination and Product/Waste role. A genuinely mixed waste stream may remain one physically defined mixture with measured composition; do not invent separation or count its components again. Keep unlike units separate, retain the original allocation and reference normalization, and reconcile the output balance. Identify actual functions before co-product allocation; waste does not acquire a co-product share merely by having mass. Confirm a compatible UUID or explicitly retain its unresolved identity. Missing records never establish zero or exclusion. fao-leap-nutrient-flows-2018 residual_waste_specific_output: Identify treatment, destination and moisture for each residue. Avoid reporting the same manure stream as both product and waste. Denominator and scope requirements：per kg live chicken output measured mass after deduction of separately transferred product streams This is a mandatory specific-output collection requirement, not a selected exchange. Preserve every actual waste, residue, reject and co-product from this operation. Create separate cards for physically distinct streams with actual material, composition/state, quantity, receiving route and Product/Waste role before dataset completeness; verify a compatible UUID or explicitly retain its unresolved identity. A genuinely mixed stream may remain one physically defined mixture supported by composition records; never invent separation or count its components again. Keep liquid and solid treatment quantities separate. Preserve original period, output balance, reference normalization and allocation rules; missing records do not establish zero or exclusion. fao-leap-nutrient-flows-2018	kg; kg N; kg VS; kg species	each removal and method period	all housing and storage periods	each manure pathway and receiving destination	per reference flow	sample result, removal ticket, factor version and balance; traceable numerator, accepted reference-output denominator and normalization worksheet
cp_feed_supply_and_intake	flock_production	Feed supply, intake and loss	stock, receipt, issue and loss ledger	feed identity/source; cohort/phase; period; opening/closing stock; receipts; on-site provision; unused returns/transfers; uneaten/spoiled mass and destination; as-fed/DM; actual intake; burden owner; accepted final output	Reconcile matched stock, scales, ration/forage estimates and disposal records under calc_feed_supply_and_intake. Keep raw totals and stage denominators; assign production and treatment burden once, then normalize to accepted final output.	kg as-fed; kg DM	each issue and period close	complete represented cohort/period	actual operated feeding nodes	per reference flow	stock and supplier records; moisture evidence; loss and no-duplication reconciliation
cp_manure_n2o_coverage	flock_production	Direct and indirect manure/soil N2O coverage	pathway N ledger and method worksheet	species/class; period; excreted N; stage stocks/transfers; system shares; volatilised NH3-N/NOx-N; leached/runoff N; application/grazing N; factor source, unit and applicability; direct/indirect components; receiving medium; linked process and assigned card; accepted final output	Retain raw stage N and component calculations under calc_manure_n2o_coverage, matched to actual operation and existing manure protocols. Document unsupported or inapplicable paths and coverage boundaries; normalize attributable N2O once.	kg N; kg N2O	each reporting period and management change	complete represented management period	actual operated and explicitly linked nodes	per reference flow	N balance, factor unit/applicability, component-to-card and no-duplication worksheet

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
c_live_mass	reference output	Sum measured transferred live mass by cohort; where batch weight is sampled, multiply class count by documented sample mean and disclose uncertainty.	event mass, head count, class and scale record	kg live chicken and head per cohort	fao-leap-poultry-2016
c_feed_net	feed	Net issued = opening stock + purchases - closing stock - returns; convert to dry matter with measured composition and assign by flock phase.	stock, invoice, recipe, moisture, flock period	kg as-fed and kg dry matter by feed identity	fao-leap-poultry-2016
c_mortality	deaths	Sum weighed carcasses or count times sampled phase-specific carcass mass; never add to live output.	death events, count, weight sample	kg mortality waste by phase	fao-leap-poultry-2016
c_manure_species	manure CH4, N2O and NH3	Calculate species by declared manure system and appropriate IPCC or nutrient-flow method from measured VS and N; document factors and molecular conversion.	pathway, VS, N, temperature or storage conditions, factors	kg CH4, kg N2O, kg NH3 separately	ipcc-2019-livestock-manure; fao-leap-nutrient-flows-2018
c_alloc_reconcile	multiple outputs and shared assets	Assign measured phase-specific burdens first; allocate remaining shared burdens by documented causal or disclosed economic basis and reconcile all output and period shares to one.	output masses, prices, service hours, occupied area-time, period	attributed burden by output and period	fao-leap-poultry-2016
calc_feed_supply_and_intake	feed_input	Feed supply used by the represented operation = opening feed stock + receipts + on-site feed entering the operation - closing feed stock - documented unused returns or transfers out. Retain in-boundary spoilage, refusals and discarded leftovers in that supply. Actual intake = that supply - measured uneaten/discarded losses, after matching moisture/DM and period; use intake only for nutrition/metabolism. Opening stock retains its prior burden and is not another purchase. Trace any unused return or transfer and its burden destination; no automatic substitution credit. Attribute production once, through either the purchased-feed dataset or the represented on-site crop/collection node, never both for the same feed. Include actual waste treatment and manure contributions once, not as a second feed-production burden.	cp_feed_supply_and_intake	separate feed supply, intake and loss quantities, in matched as-fed/DM units	fao-feed-loss-accounting-2018
calc_manure_n2o_coverage	manure_n2o_air	For each actual manure stage, calculate direct N2O, volatilisation/deposition-derived indirect N2O, and applicable leaching/runoff-derived indirect N2O separately with documented species/system activity and factor basis. Convert N2O-N to molecular N2O by 44/28 once; do not reconvert molecular masses. Retain component worksheets. Where an existing N2O card covers both direct and indirect emissions, report their non-overlapping sum; where separate direct/indirect cards exist, assign each component once to its matching card and never also report the sum. Pasture deposition and land application use the managed-soil method, not a manure-storage factor. Assign foreground versus linked treatment/pasture coverage explicitly; a manure export does not erase earlier emissions, and already covered downstream emissions are not repeated. Account for stock, transfers and previous N losses in the nitrogen cascade; indirect N2O is a downstream transformation of its precursor, not a second source-stage N loss. Normalize attributed molecular masses once to the accepted reference output. Document inapplicability; absent pathway data are not zero.	cp_manure_n2o_coverage	kg molecular N2O by pathway and assigned existing card	ipcc-2019-livestock-manure; ipcc-managed-soils-2019
chemical_species_mass_accounting	elementary_nutrient_emissions	Final elementary exchanges use the mass of the identified substance and one actual receiving compartment. Keep nutrient/activity ledgers separate: species-specific N2O-N × 44/28 gives N2O, NH3-N × 17/14 gives NH3, nitrate-N × 62/14 gives nitrate, and phosphate-P × 95/31 gives phosphate. If the selected flow is elemental phosphorus instead, report kg P and convert phosphate mass by 31/95 only when that species basis is evidenced. Apply a conversion exactly once only when the method output is on the elemental basis; measured compound mass is not reconverted. Total nutrient losses cannot be assigned to a single species without a supported split, and residual/retained soil nutrient is not an emission. Keep direct/indirect pathway ledgers and avoid repeating a pathway already included in the chosen method or upstream inventory. Factor uncertainty ranges screen factors on their stated basis, not final compound amounts or admissible site emissions. Normalize the attributable compound mass once using the accepted reference quantity and the matched measured output. Unknown activity, identity or compartment remains an evidence gap and blocks a completeness claim.	cp_manure_records; species-specific activity ledger, method pathway and factor basis, matched accepted output	Identity-specific exchanges and reconciled activity records

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	flock and outputs	Preserve species, flock purpose, production route, class, phase, output category and actual handover gate.	flock register, transfer docket, housing and range log
dq_temporal	all flows	Cover the declared cohort and reporting period, including replacement, mortality, laying and culling where relevant; reconcile opening and closing stock.	dated event logs and cohort reconciliation
dq_completeness	feed, water, energy, manure, outputs	Explain missing records and zero-value flows; reconcile purchase, use, stock, output and residue balances.	invoices, meters, feed stocks and manure tickets
dq_factors	calculated emissions	Identify flock class, manure system, method tier, factor source and version, and species conversion.	factor sheet and activity-to-emission calculation
dq_allocation	co-products and shared assets	Preserve output handovers, shared users, service periods, basis and share sum.	allocation worksheet and dispatch records

9. Validation Rules

rule_id	Applies to	Rule	source_ids
v_reference_gate	reference output	Require live state, kg Mass, head count, purpose, class, cohort and producing-farm gate; reject meat or post-slaughter output and a Number-of-items-only reference.	fao-leap-poultry-2016
v_route_delta	alternative routes	Require the managed parent plus evidence for any housed, free-range, broiler, breeder or layer difference in topology, feed, manure, energy, periods or output set; do not accept a route label alone.	fao-leap-poultry-2016
v_balance	flock and residues	Reconcile admitted, born, sold, retained and dead head counts; reconcile feed and manure mass or nutrient paths within disclosed measurement uncertainty.	fao-leap-poultry-2016; fao-leap-nutrient-flows-2018
v_output_once	eggs, manure and live birds	Require unique handover and role for every output; prevent eggs or manure from appearing as both product and waste or in two PCR datasets with the same burden.	fao-leap-poultry-2016
v_period_shared	periods and shared assets	Require opening stock, phase links, asset users, service periods and shares summing to one; reject double attribution between egg and live-bird outputs.	fao-leap-poultry-2016
v_emissions	CH4, N2O and NH3	Validate species, receiving medium, poultry category and documented manure pathway and factor; zero or omit methane when no generating pathway exists.	ipcc-2019-livestock-manure
v_unresolved_uuid	concrete exchanges	Replace every unresolved or unresolved flow with a detail-verified compatible UUID, retaining the flow identity verification evidence and selection evidence, before emitting TIDAS exchanges.	fao-leap-poultry-2016
v_foreground_emission_responsibility	Actual operated nodes and linked services	Record responsibility for on-site fuel combustion and refrigerant leakage when applicable: either quantified foreground emissions or a named linked process explicitly covering them, never merely a fuel-supply or electricity-production input. Assess special-taxon biological and residue emissions using species/route evidence, without a generic livestock factor. Identify any unresolved pathway and withhold a completeness claim; document supported absence and prevent duplicate upstream/downstream accounting.
v_feed_supply_intake_separation	All feed inputs	Reject an upstream feed inventory reduced by in-boundary refusal, spoilage or discarded leftovers without retaining their production burden. Reconcile supply, intake, stock, transfers and loss destinations under calc_feed_supply_and_intake. Do not reuse intake as supplied feed, assume zero-burden on-site feed or grant automatic avoided-product credits.	fao-feed-loss-accounting-2018
v_manure_n2o_coverage	Applicable manure and managed-soil N pathways	Require explicit direct and indirect pathway coverage, stage N balances and molecular-mass conversion. Map each component to an existing N2O card or an explicitly covering linked process once under calc_manure_n2o_coverage. Missing indirect-pathway evidence prevents a completeness claim; no default zero or duplicate aggregate-plus-components.	ipcc-2019-livestock-manure; ipcc-managed-soils-2019

10. Published Dataset Profile

Field	Value
dataset_role	foreground farm-gate live-chicken production package
downstream_use	secondary_dataset or background_dataset after route, output and identity review; process or lifecyclemodel projection
allowed_use	declared chicken purpose, geography, route, flock periods, output set, allocation and live-weight convention matching the consuming study
excluded_use	eggs as reference product; meat or slaughter output; other poultry; unreviewed generic conversion of head count to kg; cross-route substitution without matching husbandry
required_metadata	site, geography, time, flock purpose and class, route, housing and range access, phase, mortality, feed basis, manure path, output handovers, mass method, source and conditional flow identities identity resolution
required_quality_disclosure	data coverage, measured versus estimated amounts, factor tier, allocation, shared-asset basis, missing suppliers, provisional Range use and unresolved flow UUIDs
update_trigger	change in flock purpose, route, output set, manure system, reference-flow identity, major factor or data quality beyond declared coverage

11. Data Sources

Source id	Type	Reference	Used for
fao-leap-poultry-2016	official_guidance	FAO LEAP, Greenhouse gas emissions and fossil energy use from poultry supply chains (2016), https://openknowledge.fao.org/handle/20.500.14283/i6421en	poultry route, boundary, phases, output attribution and data records
ipcc-2019-livestock-manure	official_guidance	IPCC 2019 Refinement, Vol. 4, Ch. 10, Emissions from Livestock and Manure Management, https://www.ipcc-nggip.iges.or.jp/public/2019rf/pdf/4_Volume4/19R_V4_Ch10_Livestock.pdf	poultry category and manure-pathway emission calculations
fao-leap-nutrient-flows-2018	official_guidance	FAO LEAP, Nutrient flows and associated environmental impacts in livestock supply chains (2018), https://openknowledge.fao.org/handle/20.500.14283/ca1328en	manure nitrogen and nutrient-flow reporting
fao-leap-water-livestock-2019	official_guidance	FAO LEAP, Water use in livestock production systems and supply chains (2019), https://www.fao.org/partnerships/leap/resources/publications/	supplied-water source and use distinction
fao-feed-loss-accounting-2018	official_guidance	FAO 2018, Environmental performance of pig supply chains, section 11.2.2	Feed supply versus intake and waste burden, not animal parameters. Applying this accounting principle to the declared taxon is this PCR's methodological choice; no pig diet or emission factor is transferred.
ipcc-managed-soils-2019	official_guidance	IPCC 2019 Refinement, Volume 4, Chapter 11	Direct/indirect nitrogen pathways and coordination of manure storage with managed-soil emissions; select applicable species and management evidence.
route-energy-fao	official_guidance	FAO, Energy-smart food for people and climate (2011), Annex 2; and Energy use in agriculture and industry, Annex IV. https://www.fao.org/4/i2454e/i2454e00.pdf ; https://www.fao.org/4/Q1085e/q1085e0d.htm	Equipment/carrier possibilities only; site records govern applicability. No intensity, fuel share or default recipe is adopted.