{ "dataset_version": { "id": 3, "label": "v1.0 initial research build", "sha256": "39b09a298de0018be3f245e1a6765062fd7bd70f46ed2f97bf0e992b4d0a7666", "created_at": "2026-09-25 15:42:32" }, "material": { "id": "crop-residue", "category": "Crop residue", "feedstock": "Winter wheat straw", "product": "Straw bale insulation (small rectangular bales) in timber frame", "image": "crop-residue.jpg", "declared_unit": "1 m3 of installed straw bale insulation, 100 kg/m3", "density_kg_m3": 100, "summary": "Straw left in windrows by the combine is baled with a small square baler, stored dry and placed in a load-bearing or infill timber frame.", "params": [ { "id": "rho", "label": "Bale density", "value": 100, "unit": "kg/m3", "status": "A", "dq": 4, "sources": [], "note": "Typical 80-120 kg/m3 for building bales; confirm with the French professional rules for straw construction." }, { "id": "mc", "label": "Moisture content", "value": 0.12, "unit": "-", "status": "A", "dq": 4, "sources": [], "note": "Bales must stay below about 15%." }, { "id": "alloc", "label": "Allocation between grain and straw", "value": "All wheat cultivation burdens allocated to grain; straw burdens start at baling", "unit": "", "status": "A", "dq": 3, "sources": [], "note": "Economic allocation would add a share of wheat cultivation; flagged as the main sensitivity." }, { "id": "d_a4", "label": "Farm to site distance", "value": 50, "unit": "km", "status": "A", "dq": 4, "sources": [ "S31" ], "note": "EcoCocon used 10 km for straw supply." } ], "scale": [ { "basis": "DU", "value": 1, "label": "per declared unit" }, { "basis": "t", "value": 0.1, "label": "t straw per DU", "status": "D", "note": "= density / 1000" } ], "processes": [ { "id": "str-01", "module": "A1", "stage": "Wheat cultivation", "name": "Soil preparation, sowing, fertilisation, protection, combine harvest", "description": "Wheat grain is the determining product.", "flows": [ { "id": "f1", "flow": "Cultivation burden allocated to straw", "amount": 0, "unit": "kgCO2e", "basis": "DU", "ef": "direct", "status": "A", "dq": 3, "sources": [], "note": "Allocation choice (see parameter 'alloc').", "kind": "input" } ] }, { "id": "str-02", "module": "A1", "stage": "Straw recovery", "name": "Windrowing by combine", "description": "Straw left in swath behind the combine; no extra pass.", "flows": [ { "id": "f1", "flow": "No additional input", "amount": 0, "unit": "-", "basis": "DU", "ef": null, "status": "I", "dq": 3, "sources": [], "note": "", "kind": "info" } ] }, { "id": "str-03", "module": "A1", "stage": "Straw recovery", "name": "Field drying (turning if rained on)", "description": "Occasional tedding pass.", "flows": [ { "id": "f1", "flow": "Diesel, tedder", "amount": null, "unit": "L", "basis": "DU", "ef": "diesel_nr", "status": "G", "dq": 5, "sources": [ "S34" ], "note": "Conditional operation; 1.5-2.5 L/ha per pass when used.", "kind": "input" } ] }, { "id": "str-04", "module": "A1", "stage": "Straw recovery", "name": "Nutrient export compensation", "description": "Straw removal exports K and P; compensation fertiliser is sometimes attributed to straw.", "flows": [ { "id": "f1", "flow": "P and K fertiliser", "amount": null, "unit": "kg", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "str-05", "module": "A1", "stage": "Field emissions", "name": "Soil organic carbon effect of straw removal", "description": "", "flows": [ { "id": "f1", "flow": "SOC change", "amount": null, "unit": "kg CO2", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "str-06", "module": "A3", "stage": "Bale production", "name": "Baling with small square baler", "description": "", "flows": [ { "id": "f1", "flow": "Diesel, baler", "amount": 1.6, "unit": "L", "basis": "t", "ef": "diesel_nr", "status": "S", "dq": 3, "sources": [ "S34" ], "note": "Pressage balles cubiques 1.2-2 L/t.", "kind": "input", "range": [ 1.2, 2 ] }, { "id": "f2", "flow": "Baling twine (PP or sisal)", "amount": null, "unit": "kg", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "str-07", "module": "A3", "stage": "Bale production", "name": "Bale collection and loading", "description": "Telehandler or bale accumulator.", "flows": [ { "id": "f1", "flow": "Diesel", "amount": null, "unit": "L", "basis": "t", "ef": "diesel_nr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "str-08", "module": "A3", "stage": "Bale production", "name": "Covered storage and quality control", "description": "Moisture and density checks; storage under cover.", "flows": [ { "id": "f1", "flow": "No energy input", "amount": 0, "unit": "-", "basis": "DU", "ef": null, "status": "I", "dq": 3, "sources": [], "note": "", "kind": "info" } ] }, { "id": "str-09", "module": "A4", "stage": "Transport", "name": "Farm to construction site", "description": "", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": 5, "unit": "t.km", "basis": "DU", "ef": "truck", "status": "A", "dq": 4, "sources": [ "S38" ], "note": "= 0.1 t x 50 km.", "kind": "input", "range": [ 1, 10 ] } ] }, { "id": "str-10", "module": "A5", "stage": "Installation", "name": "Trimming, retying, compression and placement", "description": "Mostly manual; electric trimmers; compression straps.", "flows": [ { "id": "f1", "flow": "Electricity, tools", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "str-11", "module": "A5", "stage": "Installation", "name": "Offcut and loose straw handling", "description": "", "flows": [ { "id": "f1", "flow": "Installation losses", "amount": null, "unit": "%", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] } ], "biogenic": { "dry_mass_kg": 88, "carbon_fraction": 0.45, "co2_kg": 145.2, "status": "A", "sources": [], "note": "Carbon fraction 0.45 assumed for herbaceous biomass; replace with measured value." }, "info": [ { "label": "Plaster layers", "value": "Clay or lime plasters are separate products and are excluded from this DU", "note": "", "sources": [] } ], "benchmark": { "label": "No directly comparable straw bale value retrieved", "value": null, "unit": "", "modules": "", "use_for_residual": false, "sources": [ "S32", "S31" ], "note": "Literature shows strong dependence on straw origin and allocation." } }, "results": { "total_fossil_gwp": 0.9431000000000002, "range": [ 0.4595, 1.5070000000000001 ], "modules": { "A1": { "gwp": 0, "lo": 0, "hi": 0 }, "A2": { "gwp": 0, "lo": 0, "hi": 0 }, "A3": { "gwp": 0.5056000000000002, "lo": 0.372, "hi": 0.6320000000000001 }, "A4": { "gwp": 0.4375, "lo": 0.0875, "hi": 0.875 }, "A5": { "gwp": 0, "lo": 0, "hi": 0 } }, "biogenic_co2_stored": 145.2, "coverage": 0.2222222222222222, "dq_weighted": 3.4638956632382567, "residual": null } }