Slurry Application Calculator
Calculate the nitrogen, phosphorus, and potassium supplied by your slurry or manure application
Work in progress — this calculator is still under development and may not be fully accurate. Use results as a guide only.
Manure type & application
Typical: 20–40 m³/ha
Affects how much nitrogen is available to the crop after application losses
Field & cost
12.36 acres
Used to estimate the fertiliser saving value of your available N
Available nitrogen
12.3kg N/ha
After broadcast / splash plate efficiency (35%) — 60.0 kg total N/ha applied
Available N
12.3
kg N/ha
61 kg field total
P₂O₅
27.5
kg P₂O₅/ha
138 kg field total
K₂O
75.0
kg K₂O/ha
375 kg field total
Est. N saving
£74
vs bagged nitrogen
Total field quantities
| Nutrient | Per ha | Field total (5.00 ha) |
|---|---|---|
| Total N applied | 60.0 kg | 300 kg |
| Available N (crop-available) | 12.3 kg | 61 kg |
| P₂O₅ | 27.5 kg | 138 kg |
| K₂O | 75.0 kg | 375 kg |
About these values: Nutrient figures are typical RB209 values. Actual nutrient content varies with animal diet, water dilution, and storage method. Slurry testing is recommended for accurate planning. Available N is calculated after application method efficiency losses (broadcast 35%, trailing shoe 60%, injection 80%). Organic manure applications count towards your NVZ limit of 170 kg total N/ha/year.