5 calculators in this category
- Fertilizer NPK Requirement CalculatorGuaranteed analysis labelling (AAPFCO Official Publication)A soil test tells you to apply 150 pounds of nitrogen, 60 of P 2 O 5 and 60 of K 2 O per acre. It does not tell you how much…
- Custom Fertilizer Blend CalculatorAAPFCO guaranteed analysis (N-P₂O₅-K₂O)A soil test gives you pounds of N, P 2 O 5 and K 2 O per acre; a fertiliser dealer sells you urea, DAP and potash by the ton…
- Agricultural Lime Requirement CalculatorECCE basis under state agricultural liming materials lawA soil test reports a lime requirement in pounds of pure calcium carbonate per acre, and the quarry sells you a damp, variably…
- Manure Application Rate CalculatorUSDA-NRCS Conservation Practice Standard 590, Nutrient ManagementManure is a fertiliser with an awkward analysis: most of its nitrogen is organic and releases over years, and its phosphorus to…
- Compost Carbon to Nitrogen (C:N) Ratio CalculatorDry-weight mass balance of carbon and nitrogenA compost pile heats when its carbon to nitrogen ratio lands somewhere near 30:1 on a dry-weight basis, and this calculator…
Which one do you need?
- Fertilizer NPK Requirement Calculator
- Turn recommended pounds of N, P2O5 and K2O per acre into pounds and tons of urea, DAP and potash, with nutrients actually applied and cost per acre.
- Custom Fertilizer Blend Calculator
- Solve how many pounds of urea, DAP and potash hit a target N-P-K rate per acre, credit the nitrogen in DAP, and price the blend per acre and per ton.
- Agricultural Lime Requirement Calculator
- Convert a soil-test lime requirement into tons per acre of your actual liming material using calcium carbonate equivalence, fineness and moisture, with cost per acre.
- Manure Application Rate Calculator
- Set a manure or litter rate that meets the crop nitrogen need, then check the phosphate applied against crop removal and value the nutrients you are replacing.
- Compost Carbon to Nitrogen (C:N) Ratio Calculator
- Blend two compost feedstocks to a target carbon to nitrogen ratio on a dry-weight basis, check the moisture of the mix, and solve the weight needed to hit 30:1.