{ "dataset_version": { "id": 3, "label": "v1.0 initial research build", "sha256": "39b09a298de0018be3f245e1a6765062fd7bd70f46ed2f97bf0e992b4d0a7666", "created_at": "2026-09-25 15:42:32" }, "material": { "id": "src", "category": "Short rotation coppice", "feedstock": "Willow (Salix spp.) SRC, 3-year cutting cycle", "product": "Particleboard (P5) from SRC chips", "image": "src.jpg", "declared_unit": "1 m3 of installed particleboard (about 710 kg)", "density_kg_m3": 709.79, "summary": "Willow planted as cuttings, cut back after year one, then harvested every three years with a cut-and-chip harvester. Chips are flaked, dried, resinated and hot-pressed.", "params": [ { "id": "yield", "label": "Mean yield", "value": 9.5, "unit": "odt/ha/yr", "status": "D", "dq": 3, "sources": [ "S16" ], "note": "Midpoint of 7-12 odt/ha/yr." }, { "id": "years", "label": "Productive years over plantation life", "value": 18, "unit": "yr", "status": "A", "dq": 4, "sources": [ "S16", "S17" ], "note": "20-year plantation minus establishment years." }, { "id": "life_yield", "label": "Lifetime yield", "value": 171, "unit": "odt/ha", "status": "D", "dq": 4, "sources": [], "note": "= yield x productive years." }, { "id": "comp", "label": "Board composition per m3", "value": "640.22 odkg wood, 63.64 kg UF, 1.93 urea, 1.06 catalyst, 0.31 scavenger, 2.14 slack wax, 0.48 ammonium sulphate", "unit": "", "status": "P", "dq": 3, "sources": [ "S29" ], "note": "North American average; used as proxy for an EU board." }, { "id": "cuttings", "label": "Planting density", "value": 15000, "unit": "cuttings/ha", "status": "S", "dq": 2, "sources": [ "S16" ], "note": "" }, { "id": "mc", "label": "Fresh chip moisture (wet basis)", "value": 0.45, "unit": "-", "status": "A", "dq": 4, "sources": [], "note": "For transport mass: 640 odkg / 0.55." } ], "scale": [ { "basis": "DU", "value": 1, "label": "per declared unit" }, { "basis": "ha", "value": 0.00374398, "label": "ha x plantation lifetime per DU", "status": "D", "note": "= 0.64022 odt / 171.0 odt/ha" }, { "basis": "odt", "value": 0.64022, "label": "oven-dry tonnes of wood per DU", "status": "S", "note": "From board composition." } ], "processes": [ { "id": "src-01", "module": "A1", "stage": "Site preparation", "name": "Pre-planting herbicide burn-down", "description": "Glyphosate on grass/stubble before cultivation.", "flows": [ { "id": "f1", "flow": "Diesel, sprayer", "amount": 0.85, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 3, "sources": [ "S34", "S50" ], "note": "", "kind": "input", "range": [ 0.4, 1.3 ] }, { "id": "f2", "flow": "Herbicide active ingredient", "amount": null, "unit": "kg", "basis": "ha", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-02", "module": "A1", "stage": "Site preparation", "name": "Subsoiling / deep loosening", "description": "", "flows": [ { "id": "f1", "flow": "Diesel", "amount": 17.5, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 3, "sources": [ "S34", "S50" ], "note": "Ameublissement profond 15-20 L/ha.", "kind": "input", "range": [ 15, 20 ] } ] }, { "id": "src-03", "module": "A1", "stage": "Site preparation", "name": "Ploughing", "description": "", "flows": [ { "id": "f1", "flow": "Diesel", "amount": 15, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 3, "sources": [ "S34" ], "note": "Labour 10-20 L/ha.", "kind": "input", "range": [ 10, 20 ] } ] }, { "id": "src-04", "module": "A1", "stage": "Site preparation", "name": "Power harrowing / seedbed preparation", "description": "", "flows": [ { "id": "f1", "flow": "Diesel", "amount": 10, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 3, "sources": [ "S34" ], "note": "Preparation de sol 5-15 L/ha.", "kind": "input", "range": [ 5, 15 ] } ] }, { "id": "src-05", "module": "A1", "stage": "Establishment", "name": "Cutting production in mother beds", "description": "Nursery production of 20 cm cuttings.", "flows": [ { "id": "f1", "flow": "Willow cuttings", "amount": 15000, "unit": "cutting", "basis": "ha", "ef": null, "status": "S", "dq": 2, "sources": [ "S16" ], "note": "Amount sourced; nursery burden per cutting not available.", "kind": "input" } ] }, { "id": "src-06", "module": "A1", "stage": "Establishment", "name": "Mechanical planting (step planter)", "description": "Double rows, 0.75 m in-row.", "flows": [ { "id": "f1", "flow": "Diesel", "amount": 12.5, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 4, "sources": [ "S34", "S17" ], "note": "Proxy: combined sowing 10-15 L/ha.", "kind": "input", "range": [ 10, 15 ] } ] }, { "id": "src-07", "module": "A1", "stage": "Establishment", "name": "Pre-emergence herbicide", "description": "", "flows": [ { "id": "f1", "flow": "Diesel, sprayer", "amount": 0.85, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 3, "sources": [ "S34" ], "note": "", "kind": "input", "range": [ 0.4, 1.3 ] }, { "id": "f2", "flow": "Herbicide a.i.", "amount": null, "unit": "kg", "basis": "ha", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-08", "module": "A1", "stage": "Establishment", "name": "Inter-row mechanical weeding (2 passes)", "description": "", "flows": [ { "id": "f1", "flow": "Diesel", "amount": 6, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 3, "sources": [ "S34" ], "note": "Binage 2-4 L/ha per pass.", "kind": "input", "range": [ 4, 8 ] } ] }, { "id": "src-09", "module": "A1", "stage": "Establishment", "name": "Cut-back after first winter", "description": "Stems cut to ground level to promote multi-stem stools.", "flows": [ { "id": "f1", "flow": "Diesel", "amount": 4.75, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 4, "sources": [ "S34", "S16" ], "note": "Proxy: mowing 3.5-6 L/ha.", "kind": "input", "range": [ 3.5, 6 ] } ] }, { "id": "src-10", "module": "A1", "stage": "Crop management", "name": "Fertilisation after harvests", "description": "Many guidelines recommend low or no mineral N on fertile arable land.", "flows": [ { "id": "f1", "flow": "Mineral N", "amount": null, "unit": "kg N", "basis": "ha", "ef": "n_an", "status": "G", "dq": 5, "sources": [], "note": "Enter site-specific rate; field N2O is then added by step src-11.", "kind": "input" } ] }, { "id": "src-11", "module": "A1", "stage": "Field emissions", "name": "Field N2O from fertiliser N", "description": "", "flows": [ { "id": "f1", "flow": "N applied (for N2O)", "amount": null, "unit": "kg N", "basis": "ha", "ef": "n2o_field", "status": "G", "dq": 5, "sources": [ "S40" ], "note": "Depends on src-10.", "kind": "emission" } ] }, { "id": "src-12", "module": "A1", "stage": "Harvest", "name": "Cut-and-chip harvesting (every 3 years)", "description": "Self-propelled forage harvester with coppice header, winter harvest.", "flows": [ { "id": "f1", "flow": "Diesel, forage harvester", "amount": 2.1, "unit": "L", "basis": "odt", "ef": "diesel_nr", "status": "P", "dq": 4, "sources": [ "S34" ], "note": "Proxy: maize silage harvest 1.9-2.3 L/t DM.", "kind": "input", "range": [ 1.9, 2.3 ] } ] }, { "id": "src-13", "module": "A1", "stage": "Harvest", "name": "In-field chip haulage to field edge", "description": "Tractor + trailer shuttles.", "flows": [ { "id": "f1", "flow": "Diesel", "amount": null, "unit": "L", "basis": "odt", "ef": "diesel_nr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-14", "module": "A1", "stage": "End of plantation", "name": "Stool removal and reconversion", "description": "Stump grinding / deep loosening and ploughing after the last harvest.", "flows": [ { "id": "f1", "flow": "Diesel, stump removal", "amount": 17.5, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 4, "sources": [ "S34", "S50" ], "note": "Proxy: deep loosening.", "kind": "input", "range": [ 15, 20 ] }, { "id": "f2", "flow": "Diesel, ploughing", "amount": 15, "unit": "L", "basis": "ha", "ef": "diesel_nr", "status": "P", "dq": 3, "sources": [ "S34" ], "note": "", "kind": "input", "range": [ 10, 20 ] } ] }, { "id": "src-15", "module": "A1", "stage": "Field emissions", "name": "Soil organic carbon change", "description": "Land-use change effect of converting arable land to SRC.", "flows": [ { "id": "f1", "flow": "SOC change", "amount": null, "unit": "kg CO2", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "Site-specific; report under GWP-luluc when quantified.", "kind": "input" } ] }, { "id": "src-16", "module": "A2", "stage": "Transport", "name": "Fresh chip transport to board plant", "description": "", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": 116.404, "unit": "t.km", "basis": "DU", "ef": "truck", "status": "A", "dq": 4, "sources": [ "S38" ], "note": "= 0.640 odt / 0.55 x 100 km.", "kind": "input", "range": [ 58.2018, 232.807 ] } ] }, { "id": "src-16b", "module": "A2", "stage": "Transport", "name": "Resin and additives to the board plant", "description": "Inbound road freight of UF resin, urea, wax and salts.", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": 20.868, "unit": "t.km", "basis": "DU", "ef": "truck", "status": "A", "dq": 4, "sources": [ "S38" ], "note": "= 69.56 kg x 300 km (assumed supplier distance).", "kind": "input", "range": [ 6.956, 55.648 ] } ] }, { "id": "src-05b", "module": "A1", "stage": "Establishment", "name": "Cutting transport to the field", "description": "Cuttings stored cold and trucked from the nursery.", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": null, "unit": "t.km", "basis": "ha", "ef": "truck", "status": "G", "dq": 5, "sources": [], "note": "Nursery location and cutting mass not sourced.", "kind": "input" } ] }, { "id": "src-17", "module": "A3", "stage": "Board plant", "name": "Screening and flaking", "description": "", "flows": [ { "id": "f1", "flow": "Electricity", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-18", "module": "A3", "stage": "Board plant", "name": "Particle drying", "description": "Rotary dryer; heat from bark/dust burner.", "flows": [ { "id": "f1", "flow": "Heat, biomass (biogenic)", "amount": null, "unit": "MJ", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" }, { "id": "f2", "flow": "Electricity", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-19", "module": "A3", "stage": "Board plant", "name": "Resin blending", "description": "Resin system per board composition.", "flows": [ { "id": "f1", "flow": "UF resin", "amount": 63.64, "unit": "kg", "basis": "DU", "ef": null, "status": "S", "dq": 3, "sources": [ "S29" ], "note": "EF not available in open sources.", "kind": "input" }, { "id": "f2", "flow": "Urea", "amount": 1.93, "unit": "kg", "basis": "DU", "ef": null, "status": "S", "dq": 3, "sources": [ "S29" ], "note": "", "kind": "input" }, { "id": "f3", "flow": "Catalyst", "amount": 1.06, "unit": "kg", "basis": "DU", "ef": null, "status": "S", "dq": 3, "sources": [ "S29" ], "note": "", "kind": "input" }, { "id": "f4", "flow": "Formaldehyde scavenger", "amount": 0.31, "unit": "kg", "basis": "DU", "ef": null, "status": "S", "dq": 3, "sources": [ "S29" ], "note": "", "kind": "input" }, { "id": "f5", "flow": "Slack wax", "amount": 2.14, "unit": "kg", "basis": "DU", "ef": null, "status": "S", "dq": 3, "sources": [ "S29" ], "note": "", "kind": "input" }, { "id": "f6", "flow": "Ammonium sulphate", "amount": 0.48, "unit": "kg", "basis": "DU", "ef": null, "status": "S", "dq": 3, "sources": [ "S29" ], "note": "", "kind": "input" } ] }, { "id": "src-20", "module": "A3", "stage": "Board plant", "name": "Mat forming and continuous hot pressing", "description": "", "flows": [ { "id": "f1", "flow": "Electricity + thermal oil", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-21", "module": "A3", "stage": "Board plant", "name": "Cooling, sanding, sizing", "description": "", "flows": [ { "id": "f1", "flow": "Electricity", "amount": null, "unit": "kWh", "basis": "DU", "ef": "elec_fr", "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-22", "module": "A3", "stage": "Board plant", "name": "Packaging", "description": "", "flows": [ { "id": "f1", "flow": "Packaging", "amount": null, "unit": "kg", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] }, { "id": "src-23", "module": "A4", "stage": "Transport", "name": "Delivery to site", "description": "", "flows": [ { "id": "f1", "flow": "Truck transport", "amount": 70.98, "unit": "t.km", "basis": "DU", "ef": "truck", "status": "A", "dq": 4, "sources": [ "S38" ], "note": "= 0.7098 t x 100 km.", "kind": "input", "range": [ 35.49, 141.96 ] } ] }, { "id": "src-24", "module": "A5", "stage": "Installation", "name": "Cutting and fixing boards", "description": "Circular saw, screws or nails.", "flows": [ { "id": "f1", "flow": "Fasteners + electricity", "amount": null, "unit": "-", "basis": "DU", "ef": null, "status": "G", "dq": 5, "sources": [], "note": "", "kind": "input" } ] } ], "biogenic": { "dry_mass_kg": 640.22, "carbon_fraction": 0.5, "co2_kg": 1173.74, "status": "D", "sources": [ "S45", "S29" ], "note": "" }, "info": [ { "label": "Harvest cycles over plantation life", "value": "6 harvests (every 3 years after cut-back)", "note": "Informs machinery passes.", "sources": [ "S16", "S17" ] } ], "benchmark": { "label": "Kronospan raw particleboard EPD HUB-0864, GWP-fossil A1-A3", "value": 198, "unit": "kg CO2e/m3", "modules": "A1-A3", "use_for_residual": true, "sources": [ "S30" ], "note": "Uses 78% secondary (recycled) wood, not SRC. Residual is therefore indicative only." } }, "results": { "total_fossil_gwp": 23.65305605116, "range": [ 13.428322875400001, 43.812233122879995 ], "modules": { "A1": { "gwp": 5.431006051160001, "lo": 4.6216403754, "hi": 6.150920622879999 }, "A2": { "gwp": 12.011299999999999, "lo": 5.7013074999999995, "hi": 25.239812499999996 }, "A3": { "gwp": 0, "lo": 0, "hi": 0 }, "A4": { "gwp": 6.21075, "lo": 3.105375, "hi": 12.4215 }, "A5": { "gwp": 0, "lo": 0, "hi": 0 } }, "biogenic_co2_stored": 1173.74, "coverage": 0.4, "dq_weighted": 3.9673877368872947, "residual": { "benchmark": 198, "modelled_a1_a3": 17.44230605116, "value": 180.55769394884, "share_explained": 0.08809245480383839 } } }