Nutrient Absorption Efficiency NAE = Uptake / Nutrient Applied Nutrient Uptake with Fertilizer (Uf) Nutrient Uptake without...
Nutrient Use Efficiency (NUE) NUE = Yield / Nutrient Applied Yield with Fertilizer (Yf) Yield without Fertilizer...
Nutrient Uptake Rate Uptake Rate = (U₂ − U₁) / (t₂ − t₁) Nutrient at Time 1...
Thermal Time Requirement Thermal Time = ΣGDD Maximum Temperature (°C) Minimum Temperature (°C) Base Temperature (°C) Number...
Climate Productivity Index (CPI) CPI = Yield / ΣGDD Yield (kg/ha) Total GDD (ΣGDD) Calculate
Crop Coefficient (Kc) Calculator Kc = ETc / ETo | ETc = Kc × ETo Reference ET...
Radiation Interception (%) RI (%) = (1 − e⁻ᵏᴸᴬᴵ) × 100 Leaf Area Index (LAI) Extinction Coefficient...
Heat Use Efficiency (HUE) HUE = Yield / ΣGDD Yield (kg/ha) Total GDD (ΣGDD) Calculate
Phenothermal Index (PTI) PTI = ΣGDD / Number of Days Total GDD (ΣGDD) Number of Days Calculate
Heliothermal Units (HTU) HTU = GDD × Sunshine Hours Maximum Temperature (°C) Minimum Temperature (°C) Base Temperature...
Photothermal Units (PTU) PTU = GDD × Day Length Maximum Temperature (°C) Minimum Temperature (°C) Base Temperature...
Growing Degree Days (GDD) GDD = ((Tmax + Tmin) / 2) − Tbase Maximum Temperature (°C) Minimum...
Physiological Efficiency Index PEI = Economic Yield / Total Biomass Economic Yield (kg/ha) Total Biomass (kg/ha) Calculate
Crop Vigor Index CVI = Germination% × Seedling Length Germination (%) Seedling Length (cm) Calculate
Competitive Ability Index CAI = RY₁ / RY₂ Crop 1 Yield (Mixture) Crop 1 Yield (Pure) Crop...