Dry blended NPK fertilizer from urea, MAP and potassium chloride

1. Scope and Applicability

This method covers dry physical blending of purchased granular urea, granular monoammonium phosphate (MAP) and granular fertilizer-grade potassium chloride with K2O-equivalent mass fraction ≥60.0%. The route comprises reception, segregated storage, pre-blend screening, metered feeding, mixing, dry dust collection, final acceptance and bulk loading or sack filling. Blending and packing are one foreground unit, with separate stage meters. There is no chemical reaction, granulation, compaction, added water, coating or thermal drying. This boundary follows the route distinction in eu-jrc-lvic-aaf-2007, §7.2.1, and the dry-blend definition and physical-quality controls in efba-solid-blending-2016, §§2–5.

Exclude reacted mixed-acid and Odda compound fertilizers, NP/PK/NK products, organic blends, solutions or suspensions, ammonium-nitrate blends, micronutrient additions and coated products. A real site using other ingredients, liquid cleaning, combustion, extra packaging or other observed releases needs additional individually identified rows and evidence before applying this method. No source example supplies a default recipe, assay, yield, energy, loss or emission quantity. zaria-blending-2026 corroborates industrial dry-blending existence only. The broader reference identity is usable only under the product, route and source-context limitations in Section 3; actual SKU and supplier/background compatibility still require documented verification.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.other-transportable-goods-except-metal-products-machinery-and-equipment.basic-chemicals.fertilizers-containing-three-nutrients-nitrogen-phosphorus-and-potassium
classification_refs	CPC 3.0 34641; proposed narrower scope; no accepted mapping
covered_products	Ternary granular dry blend using only the three specified mineral/chemical feeds
excluded_products	Reacted, compacted, coated, organic, liquid, binary or ammonium-nitrate products
representative_product	One actual accepted SKU with declared N–P2O5–K2O analysis, not a prescribed grade
production_route	Dry physical blending of purchased granules; separate upstream manufacturing datasets
market_state	Solid mixture at plant gate, bulk or bagged; moisture included, packaging excluded from net product mass

3. Reference Flow

Field	Value
What	Supply a mineral/chemical fertilizer mixture containing N, P and K
How much	1 kg accepted net finished product
How well	Actual SKU nutrient analysis, moisture, granule-size distribution, blend homogeneity and agreed acceptance specification
How long or cycle	One declared production and storage campaign through plant-gate delivery; field use excluded
reference_flow_link	npk_product

Field	Value
Reference amount	1
Reference product flow	Multi-nutrient compound fertilizer, formulation unspecified b4e892e2-0421-4512-88e7-a5f8ae556d7a
Reference flow property	Mass (93a60a56-a3c8-11da-a746-0800200b9a66)
Reference unit group	93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	Actual SKU and recipe; all three positive nutrient contents; urea/MAP/KCl grades and suppliers; dry physical route; N and P2O5/K2O assay bases and P solubility; net as-delivered mass and moisture; particle-size and segregation tests; plant, campaign and electricity supply; package type; broader reference source-context limitations and verified actual supplier boundary

Required qualifiers must accompany the dataset. The 1 kg basis is product supply, not a nutrient-equivalent functional comparison or a field-response claim. The selected broader Product flow specifies no CAS, fixed grade, formulation or manufacturing route, and no each-granule nutrient structure; this PCR restricts it to the actual dry urea/MAP/KCl ternary blend. Its native name retains a Zhangjiakou, Hebei linseed-field input/seed-fertilizer context under DB1307/T 149—2022, while the source leaves formulation and supplier unspecified and cuts off upstream production. These source-use/interface limitations are disclosed; they do not establish the target SKU, plant-gate provider or zero upstream burden. Do not transfer the original field-use quantity, geographic provider claim or cutoff into this production inventory; verify the actual supply interface and complete upstream burdens separately.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
net_product	npk_product	Mass	kg	Weigh accepted product excluding sacks and liners. Include actual retained moisture; record gross, tare and calibrated net mass. Use cp_net.
nutrient_basis	feed_urea; feed_map; feed_kcl; npk_product	Mass	kg	Inventory uses commercial product mass, not kg N, P2O5 or K2O. Store measured nutrient fractions and moisture separately; oxide equivalents are reporting conventions, not separate reagent inputs. No theoretical purity substitution.
energy_basis	electricity	Net calorific value	MJ	Preserve the verified reference property and unit. Convert metered kWh to MJ using exactly 3.6 MJ/kWh; match delivered electricity and supplier boundary, with no calorific fuel conversion.
pm_intervals	pm25; pm2510; pm10plus	Mass	kg	Use non-overlapping size intervals and the same actual measurement basis. Report total PM as a check only, never as a fourth summed exchange.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased finished granular urea, MAP and KCl received for dry blending
starting_condition_role	upstream_product_interface
product_classification_scope	Specified dry-blend subset of CPC 3.0 34641
recursive_input_rule	Do not recursively apply this blending unit to its three chemically different feeds; internal rework is an internal balance only
upstream_dataset_requirement	Match each feed, grid and package to its actual upstream manufacture and inbound delivery; disclose absent providers and avoid double counted transport
disclosure	Report site, period, route, recipes and grade campaigns, all interfaces, storage/packaging, emissions, waste receivers and unresolved references

The cradle-to-gate supply model connects upstream manufacturing and transport to the measured gate-to-gate blending unit. Field application, soil emissions and downstream package disposal are outside this production dataset. Declare inbound transport distances, load, mode and existing provider transport scope; do not claim cradle-to-gate completeness while missing links remain. Indoor dry cleaning and dust recovery are included; liquid scrubbing/cleaning and on-site combustion fall outside this selected route and require explicit method extension.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
blend	Reception, screening, dry blending, dust control, storage and delivery packing	required	Declared dry route; packaging rows conditional on actual delivery	foreground	npk_product

Physical stages: received feeds → separate storage and screening → metered mixing → acceptance → storage and delivery. Capture stage electricity and feed transfers independently, but export only one final product output. Recovered dust and rework move internally with equal outbound/inbound measured amounts; they are never additional purchased feeds, reference products or external credits.

Process: dry NPK blending (blend)

Inputs

Product flows

Urea (feed_urea)

Purchased granular synthetic urea; require actual grade, particle-size distribution, moisture, nitrogen assay and supplier route. Do not substitute nutrient-as-N mass or UAN solution.

• Selected flow: Urea (3f8850c0-f718-4c4b-8fcb-8fd42e03aa8e)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_feed; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Monoammonium phosphate (feed_map)

Purchased granular MAP (NH4H2PO4); actual N and P2O5-equivalent assays and solubility are mandatory. Reject powder-only identity and DAP substitution. No pure-salt theoretical composition becomes a fertilizer-grade assay.

• Selected flow: Monoammonium phosphate (90d4a1dc-fa9b-4f22-9c97-8acb0a457d0d)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_feed; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Potassium chloride fertilizer, granular, K2O equivalent ≥60.0% by mass (feed_kcl)

Purchased granular fertilizer KCl within the selected identity: K2O-equivalent mass fraction at least 60.0%, GB/T 37918-2019 grade context. Confirm actual grade and assay; this identity threshold is not a recipe or universal assay. Reject the alternative volume-based KCl record unless its actual volume basis and supplier conversion are established. This UUID specifies locationOfSupply CN and China at-plant product supply. Document the actual compatible CN source interface, supplier and inbound delivery; non-CN product supply needs a separately verified matching flow before linkage.

• Selected flow: Potassium chloride fertilizer, granular, K2O equivalent ≥60.0% by mass (c8585965-5595-48da-9260-2970ed1905cb)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_feed; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_feed
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Alternating current (electricity)

Metered low-voltage (<1 kV) grid electricity to user, for conveyors, screens, weighing, mixer, extraction fans, dry cleaning and bagging. The database reference property is Net calorific value; report delivered electrical energy, not an invented fuel heating value. Check supplier voltage, geography, period and transformation boundary. This UUID specifies locationOfSupply CN; use only a documented matching CN user-side grid-average <1 kV supply interface. Non-CN supply needs a separately verified matching electricity flow and provider before linkage.

• Selected flow: Alternating current (50657322-939c-4829-a87b-47c093bfa6a7)
• Flow property / unit: Net calorific value / MJ
• Amount rule: Collect attributable actual quantity using cp_energy; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_energy
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Polypropylene woven sack (bag_pp)

One purchased PP woven outer sack, conditional on bagged delivery. Obtain empty sack mass, grade, recycled content, closure and actual supplier. No fixed bag size or count is prescribed; the seed-specific 25 kg bag candidate does not establish this general sack identity.

• Selected flow: Polypropylene woven sack
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_pack; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_pack
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Polyethylene film (liner_pe)

One PE film liner, conditional on its actual use. Verify polymer CAS 9002-88-4, thickness, grade, additives, recycled content and supplier mass basis. The source classification erroneously indicates luggage; retain only conditional physical film identity, with source clarification required. Do not include film again in an already composite sack background.

• Selected flow: Polyethylene film (e64eb06c-6dc9-45f1-b003-3dc6c44b27e2)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_pack; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_pack
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Outputs

Product flows

Multi-nutrient compound fertilizer, formulation unspecified (npk_product)

One accepted finished physical mixture at plant gate; the blend has all three nutrients in its representative bulk sample, not necessarily in every granule. Product mass includes actual retained moisture and excludes all packaging. Use the broader selected Product flow only with the dry-blend qualifiers and explicit source-use/interface limitations in Section 3; no Odda, aquaculture or residual n.e.c. identity is substituted.

• Selected flow: Multi-nutrient compound fertilizer, formulation unspecified b4e892e2-0421-4512-88e7-a5f8ae556d7a
• Flow property / unit: Mass / kg
• Amount rule: 1 kg
• Value mode: fixed_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: method_formula
• Collection protocol: cp_net
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Waste flows

Dust (discard_fines)

One separately collected discarded fertilizer-dust mixture from this blending campaign, conditional on material leaving the site for treatment. Confirm urea/MAP/KCl composition, nutrient and moisture assays, contaminants and receiver acceptance. This broad industrial-dust identity supplies no fertilizer-specific treatment dataset. Material returned internally is neither this waste output nor an air emission.

• Selected flow: Dust (2a6c9b60-a075-45ec-b611-c3b4dd255935)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_waste; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_waste
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Discarded polypropylene woven sacks from NPK packing (waste_pp)

One rejected or damaged PP sack waste stream. Record residual fertilizer contamination, actual liner separation and receiving treatment. Accepted sacks delivered with product are not waste here; separate PE liner waste rather than reporting a mixed polymer collection row.

• Selected flow: Discarded polypropylene woven sacks from NPK packing
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_waste; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_waste
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Discarded polyethylene film liners from NPK packing (waste_pe)

One separated discarded PE liner waste stream. Weigh after recording residual fertilizer mass and receiver conditions; distinguish saleable clean scrap from contaminated treatment waste and prevent counting retained packaging twice.

• Selected flow: Discarded polyethylene film liners from NPK packing
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_waste; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_waste
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

Elementary flows

particles (PM2.5) (pm25)

Actual residual particles ≤2.5 µm emitted to outdoor air, unspecified subcompartment, after control equipment and including attributable fugitive releases. Collect size-resolved measurements; no default emission or particle-size fraction. Captured dust is not this exchange.

• Selected flow: particles (PM2.5) (08a91e70-3ddc-11dd-9293-0050c2490048)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_air; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

particles (PM2.5 - PM10) (pm2510)

Actual residual outdoor-air particles >2.5 and ≤10 µm. This interval is disjoint from pm25 and pm10plus. Cumulative PM10 must first have measured PM2.5 removed on identical sampling, moisture and gas-volume bases; without compatible data retain an unresolved split, never a fabricated fraction.

• Selected flow: particles (PM2.5 - PM10) (08a91e70-3ddc-11dd-9501-0050c2490048)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_air; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

particles (> PM10) (pm10plus)

Actual residual particles >10 µm to outdoor air, unspecified subcompartment. Total particulate minus cumulative PM10 is usable only with compatible simultaneous measurements and non-negative reconciliation. Indoor collected dust and deposition retained on site are not outdoor releases.

• Selected flow: particles (> PM10) (fe0acd60-3ddc-11dd-a70a-0050c2490048)
• Flow property / unit: Mass / kg
• Amount rule: Collect attributable actual quantity using cp_air; report per 1 kg reference flow. No default amount.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow
• Basis kind: reference_flow
• Evidence kind: collected_record
• Collection protocol: cp_air
• Sources: efba-solid-blending-2016; eu-jrc-lvic-aaf-2007

7. Allocation and Co-product Handling

A normal declared blend has one commercial output and no default co-product allocation. Keep the unallocated physical mass/water/N/P/K ledger distinct from any allocated environmental-burden ledger. First separate grade campaigns and dedicated equipment by measured records. Shared electricity uses submetering or measured equipment duty and campaign attribution; disclose unresolved attribution and test its sensitivity. Do not allocate input ingredient mass by nutrient percentages, mechanically reduce physical product by an allocation share, or credit internal rework. If an actual separately sold fertilizer-dust co-product exists, record its identity, quantity, quality, receiver and function, revise the waste row and review allocation independently before use.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

Each protocol retains original campaign totals. Reconcile attributable quantities and accepted net finished-product mass in the same campaign before normalization; all aggregated results are per 1 kg reference flow.

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_net	blend	npk_product	foreground_record	SKU; grade; gross; tare; accepted net kg; moisture; N/P2O5/K2O assays; solubility; rejected lots; starting/ending stocks	Calibrated product weighing and representative batch sampling; compare stored and delivered quality	kg	Each batch and stage; air tests linked to represented operating periods	One complete declared campaign, including starts, stops, cleaning and storage	Selected site and actual grade campaigns	per 1 kg reference flow	Calibration, sampling, certificates, raw totals and reconciliation
cp_feed	blend	feed_urea; feed_map; feed_kcl	foreground_record	supplier; lot; grade; recipe; feed kg; stocks; assays; moisture; sieve analysis; compatibility evidence	Calibrated feed scales and stock reconciliation; retain actual supplier certificates and physical tests	kg	Each batch and stage; air tests linked to represented operating periods	One complete declared campaign, including starts, stops, cleaning and storage	Selected site and actual grade campaigns	per 1 kg reference flow	Calibration, sampling, certificates, raw totals and reconciliation
cp_energy	blend	electricity	foreground_record	stage; meter; kWh; time; voltage; supplier; region; campaign; shared loads	Read calibrated stage meters including fans and packing; reconcile bills and duty attribution	MJ	Each batch and stage; air tests linked to represented operating periods	One complete declared campaign, including starts, stops, cleaning and storage	Selected site and actual grade campaigns	per 1 kg reference flow	Calibration, sampling, certificates, raw totals and reconciliation
cp_pack	blend	bag_pp; liner_pe	foreground_record	supplier; polymer; grade; actual empty component kg; delivered package count; composite boundary; damaged kg	Weigh PP and PE independently and reconcile issue, retained stock and damaged material	kg	Each batch and stage; air tests linked to represented operating periods	One complete declared campaign, including starts, stops, cleaning and storage	Selected site and actual grade campaigns	per 1 kg reference flow	Calibration, sampling, certificates, raw totals and reconciliation
cp_waste	blend	discard_fines; waste_pp; waste_pe	foreground_record	origin; composition; contamination; kg; moisture; internal recovery; receiver; treatment; manifest	Weigh each separated external stream and internal returns; retain receiver acceptance and transfer records	kg	Each batch and stage; air tests linked to represented operating periods	One complete declared campaign, including starts, stops, cleaning and storage	Selected site and actual grade campaigns	per 1 kg reference flow	Calibration, sampling, certificates, raw totals and reconciliation
cp_air	blend	pm25; pm2510; pm10plus	foreground_record	source; stack/fugitive; size fractions; concentration; dry/wet and actual/normal gas basis; gas flow; operating time; controls; detection limits	Measure actual residual releases after dry control with documented sampling coverage and fugitive method; no emission factor default	kg	Each batch and stage; air tests linked to represented operating periods	One complete declared campaign, including starts, stops, cleaning and storage	Selected site and actual grade campaigns	per 1 kg reference flow	Calibration, sampling, certificates, raw totals and reconciliation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
campaign_normalization	all inventory rows	For every non-reference exchange, retain its attributable raw campaign total X in the stated numerator unit; apply x = X / Q exactly once here, after conversions and load calculations. Use the complete matched site/route/SKU-state campaign pool, including failed and zero-output batches, starts/stops, rejects, cleaning, storage and rework with their actual input, energy, waste and emission burdens. Reconcile opening/closing feed, work-in-progress and product stocks with carried production burdens, receipts, withdrawals and returns. Q is the unique positive accepted as-delivered net product kg attributable to that pool after stock and return reconciliation; a returned and reaccepted net batch is confirmed only once and internal rework is not added output. If Q <= 0 or the pool and carried burdens cannot be matched, keep raw records and leave the normalized result unavailable. Reference product is exactly 1 kg; retain the unallocated physical ledger separately from burden attribution.	cp_net; cp_feed; cp_energy; cp_pack; cp_waste; cp_air	Normalized exchanges plus retained raw totals	efba-solid-blending-2016
electricity_conversion	electricity	E_MJ = metered campaign E_kWh × 3.6; apply measured campaign attribution and retain the resulting raw campaign MJ total. Only campaign_normalization divides by Q.	cp_energy; cp_net	E_MJ; raw campaign total	efba-solid-blending-2016
physical_balance	all inventory rows	On the unallocated campaign ledger reconcile received feeds plus opening fertilizer stocks with accepted product, closing stocks, actual discarded fertilizer and actual size-resolved emitted dust; record rejected product and signed moisture exchange separately. Retained packaging is a separate material ledger. Measure loss composition; do not infer a constant yield or force residuals into a pollution row.	cp_feed; cp_net; cp_pack; cp_waste; cp_air	Mass, water and measured N/P/K component balances with residuals	efba-solid-blending-2016

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
quality_identity	all inventory rows	Verify actual grade, state, formulation, supplier and reference property independently of identity UUID lookup. No absent provider or route mismatch is a zero burden.	cp_feed; cp_net; cp_pack
quality_blend	npk_product	Retain representative nutrient analysis, water content, particle-size compatibility and segregation tests through storage/delivery; measured feed recipe alone is insufficient if screening or losses change composition.	efba-solid-blending-2016
quality_coverage	all inventory rows	Cover complete campaign and all operated stages; distinguish conditional absence, measured zero, below detection, missing measurement and unresolved identity. Add atomic rows for real uncovered flows before use.	cp_net; cp_air; cp_waste

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference	npk_product	Require the actual finished dry-blend SKU, three-feed route, complete Section 3 qualifiers and supplier-compatible Mass/kg basis. The broader reference UUID does not establish source-case formulation, a matching plant-gate provider or permission to inherit an upstream cutoff; unresolved actual compatibility prevents a complete site dataset. A measurement check alone is not scientific approval.	eu-jrc-lvic-aaf-2007
validate_denominator	all inventory rows	One output equals 1 kg net reference product; bilingual rows, collection and calculations use the same denominator. All campaign amounts are actual measurements, with no defaults.	efba-solid-blending-2016
validate_scope	all inventory rows	Check dry physical route and all three declared nutrients. Any added ingredient, water, reaction, compaction, combustion or wet treatment requires method review and additional atomic rows.	eu-jrc-lvic-aaf-2007; efba-solid-blending-2016
validate_emissions	pm25; pm2510; pm10plus; discard_fines	Check outdoor air medium, non-overlapping bins, sampling scope, actual gas-volume basis and no duplicate captured dust. Unmeasured fractions remain unresolved rather than zero.	efba-solid-blending-2016

10. Published Dataset Profile

Field	Value
dataset_role	foreground_dataset
downstream_use	secondary_dataset; background_dataset
allowed_use	Future verified supply model for the selected dry NPK blend only
excluded_use	Unverified site datasets; reactive NPK, nutrient-as-N datasets, crop response or field emissions
required_metadata	All reference qualifiers, period, site, upstream links, campaign records, receipts and waste/air boundaries
required_quality_disclosure	Reference source-context limitations, package/waste identities, supplier links, sampling coverage, classification defect and uncertainty
update_trigger	Reference identity or source-context constraint change, new route/ingredient, assay or supplier change, changed waste/control or measurement method

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-2025	official_guidance	UN Statistics Division, CPC 3.0 Structure, 30 June 2025. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv	34641 classification boundary only; no canonical identity or route prescription
eu-jrc-lvic-aaf-2007	official_guidance	European Commission, LVIC-AAF BREF, August 2007, §§7.1 and 7.2.1, printed 283/285, PDF 311/313. https://bureau-industrial-transformation.jrc.ec.europa.eu/sites/default/files/2022-03/LVIC-AAF.pdf?download=1	Distinguish physical mixing from reaction and compaction; nutrient reporting bases; no numerical source defaults
efba-solid-blending-2016	handbook	European Fertilizer Blenders Association, Handbook of Solid Fertiliser Blending, Code of Good Practice for Quality, third edition 2016, March 2017 file; §§2–5,7–9. https://fertiliser-society.org/wp-content/uploads/2019/11/Blender-Handbook-2017-efba.pdf	Dry-blend definition, feed quality and compatibility, weighing, screening, segregation, sampling and physical/chemical tests; historical legislative references are not current legal advice; no table values copied as recipes or inventory defaults
zaria-blending-2026	literature	Zaria Fertilizers and Packaging Ltd, About Us, snapshot 2026-10-14. https://zariablenders.com/about-us/	Producer corroboration of industrial dry NPK blending only; no site quantity, recipe or emission transfer