Calculator

Category: Crop growth and Yield Calculator

  • Crop Growth Rate Calculator

    Crop Growth Rate Calculator

    Crop Growth Rate (CGR)

    Enter dry matter weights and time intervals

    Formula:

    Crop Growth Rate
    CGR = (W₂ − W₁) / (t₂ − t₁)

    Where:
    W₁ = Dry weight at time t₁
    W₂ = Dry weight at time t₂
    t₁, t₂ = Time intervals (days)

  • Relative Growth Rate (RGR) Calculator

    Relative Growth Rate (RGR) Calculator

    (Plant Breeding / Agronomy Growth Analysis)

    Formula Used:

    RGR = (ln W2 − ln W1) ÷ (t2 − t1)
    Unit: day−1

    Result:

    Relative Growth Rate (RGR): —

  • Biomass Accumulation Calculator

    Biomass Accumulation Calculator

    (Plant Breeding / Agronomy)

    Formula Used:

    Biomass Accumulation = Final Dry Matter (W₂) − Initial Dry Matter (W₁)

    Result:

    Biomass Accumulation: —

  • Leaf Area Index (LAI) Calculator

    Leaf Area Index (LAI) Calculator

    (Plant Breeding / Agronomy)

    Formula Used:

    LAI = Total Leaf Area ÷ Ground Area

    Result:

    Leaf Area Index (LAI): —

  • Harvest Index (HI) Calculator

    Harvest Index (HI) Calculator

    (Plant Breeding / Agronomy)

    Formula Used:

    Harvest Index (%) = (Economic Yield ÷ Biological Yield) × 100

    Result:

    Harvest Index (HI): —

  • Economic Yield Calculator

    Economic Yield Calculator

    (Plant Breeding / Agronomy)

    Formula Used:

    Economic Yield = Total Produce − Non-Economic Portion

    Result:

    Economic Yield: —

  • Leaf Area Duration (LAD) Calculator

    🌿 Leaf Area Duration (LAD) Calculator

    What is Leaf Area Duration?

    Leaf Area Duration (LAD) represents the persistence of leaf area over time. It integrates leaf area index with duration and indicates the crop’s photosynthetic capacity.

    Formula Used

    LAD = (LAI₁ + LAI₂) ÷ 2 × (t₂ − t₁)

    Where:
    • LAI₁ = Leaf Area Index at time t₁
    • LAI₂ = Leaf Area Index at time t₂
    • t₂ − t₁ = Time interval (days)

    Enter Observations

    Interpretation:
    • Higher LAD → longer photosynthetic activity
    • Strongly correlated with dry matter production
    • Used in crop growth analysis & yield prediction

  • Grain Yield Calculator

    🌾 Grain Yield Calculator

    What is Grain Yield?

    Grain Yield is the economic yield of a crop, expressed as weight of harvested grain per unit area (kg/ha or quintal/ha).

    Formula Used

    Grain Yield (kg/ha) = (Grain weight per plot × 10,000) ÷ Plot area (m²)

    Where:
    • Grain weight = Harvested grain from sample plot (kg)
    • Plot area = Area of harvested plot (m²)

    Enter Field Data

    Field Tip:
    • Use clean, sun-dried grain weight
    • Record exact plot area for accuracy
    • Convert to q/ha for farmer-friendly reporting

  • Straw Yield Calculator

    🌾 Straw Yield Calculator

    What is Straw Yield?

    Straw Yield is the weight of vegetative plant parts (stem, leaves, chaff) excluding grain, expressed per unit area (kg/ha or q/ha).

    Formula Used

    Straw Yield (kg/ha) = (Straw weight per plot × 10,000) ÷ Plot area (m²)

    Where:
    • Straw weight = Sun-dried straw from sample plot (kg)
    • Plot area = Area of harvested plot (m²)

    Enter Field Data

    Field Tip:
    • Use oven-dry or sun-dry straw consistently
    • Remove grain completely before weighing
    • Straw yield is essential for fodder & residue studies

  • Net Assimilation Rate Calculator

    Net Assimilation Rate Calculator

    Net Assimilation Rate (NAR)

    Enter dry weight, leaf area and time values

    Formula:

    Net Assimilation Rate
    NAR = [(W₂ − W₁)(lnL₂ − lnL₁)] / [(t₂ − t₁)(L₂ − L₁)]

    Where:
    W₁, W₂ = Dry weight
    L₁, L₂ = Leaf area
    t₁, t₂ = Time (days)