Calculator

Category: Soil Fertility and Nutrent Management

  • Nutrient Requirement Calculator

    Nutrient Requirement Calculator

    Definition:
    Nutrient requirement is the total amount of a plant nutrient needed by a crop to achieve a target yield. It is calculated based on the expected yield and the nutrient uptake per unit yield.
    Formula:
    Nutrient Requirement (kg/ha) =
    Target Yield (q/ha) × Nutrient Uptake (kg/q)

  • Fertilizer Nutrient Conversion Calculator

    Fertilizer Nutrient Conversion Calculator

    Definition:
    Fertilizer nutrient conversion is the process of calculating the quantity of a fertilizer required to supply a given amount of plant nutrient, based on the nutrient percentage present in the fertilizer.
    Formula:
    Fertilizer Required (kg/ha) =
    [Required Nutrient (kg/ha) × 100] ÷ Nutrient Content (%)

  • Urea Requirement Calculator

    Urea Requirement Calculator

    Definition:
    Urea requirement is the quantity of urea fertilizer needed to supply the required amount of nitrogen to a crop. Urea contains 46% nitrogen and is the most commonly used nitrogenous fertilizer.
    Formula:
    Urea Required (kg/ha) =
    [Nitrogen Requirement (kg/ha) × 100] ÷ 46

  • DAP Requirement Calculator

    DAP Requirement Calculator

    Definition:
    DAP (Di-Ammonium Phosphate) requirement is the quantity of DAP fertilizer needed to supply the required amount of phosphorus to a crop. DAP contains 46% P₂O₅ and 18% nitrogen.
    Formula:
    DAP Required (kg/ha) =
    [P₂O₅ Requirement (kg/ha) × 100] ÷ 46

  • MOP Requirement Calculator

    MOP Requirement Calculator

    Definition:
    MOP (Muriate of Potash) requirement is the quantity of MOP fertilizer needed to supply the required amount of potassium to a crop. MOP contains 60% K₂O.
    Formula:
    MOP Required (kg/ha) =
    [K₂O Requirement (kg/ha) × 100] ÷ 60

  • SSP Requirement Calculator

    SSP Requirement Calculator

    Definition:
    SSP (Single Super Phosphate) requirement is the quantity of SSP fertilizer needed to supply the required amount of phosphorus to a crop. SSP contains 16% P₂O₅ and also supplies calcium and sulphur.
    Formula:
    SSP Required (kg/ha) =
    [P₂O₅ Requirement (kg/ha) × 100] ÷ 16

  • Fertilizer Efficiency Calculator

    Fertilizer Efficiency Calculator

    Definition:
    Fertilizer efficiency refers to the percentage of applied fertilizer nutrient that is actually taken up and utilized by the crop. It indicates how effectively the applied fertilizer is used.
    Formula:
    Fertilizer Efficiency (%) =
    (Nutrient Uptake ÷ Nutrient Applied) × 100

  • Nutrient Use Efficiency (NUE) Calculator

    Nutrient Use Efficiency (NUE) Calculator

    Definition:
    Nutrient Use Efficiency (NUE) is the increase in crop yield per unit of nutrient applied. Agronomic Efficiency (AE) is the most commonly used form of NUE in agronomy and fertilizer studies.
    Formula (Agronomic Efficiency):
    NUE (kg yield/kg nutrient) =
    (Yield with fertilizer − Yield without fertilizer) ÷ Nutrient applied

  • Apparent Nutrient Recovery (ANR) Calculator

    Apparent Nutrient Recovery (ANR) Calculator

    Definition:
    Apparent Nutrient Recovery (ANR) is the proportion of applied nutrient that is taken up by the crop. It is calculated as the increase in nutrient uptake due to fertilizer application, expressed as a percentage of the nutrient applied.
    Formula:
    Apparent Nutrient Recovery (%) =
    [(Uptake with fertilizer − Uptake without fertilizer) ÷ Nutrient applied] × 100