Physiological Efficiency of Nutrients PEN = (Yf − Y0) / (Uf − U0) Yield with Fertilizer (Yf)...
Mineral Nutrition and Metabolism
Nutrient Deficiency Severity Index NDSI (%) = (Optimal − Observed) / Optimal × 100 Optimal Value Observed...
SPAD Value Interpretation Higher SPAD = Higher Chlorophyll = Better Nitrogen Status Enter SPAD Value Interpret
Chlorophyll Content Index (CCI) CCI = (NIR − Red) / (NIR + Red) × 100 Near Infrared...
Photosynthetic Nitrogen Use Efficiency PNUE = Photosynthesis / Leaf Nitrogen Photosynthetic Rate (A) Leaf Nitrogen Content (N)...
Nitrogen Use Efficiency (NUE) NUE = (Yf − Y0) / N Yield with Nitrogen (Yf) Yield without...
Nutrient Translocation Index NTI (%) = (Nutrient in Grain / Total Nutrient) × 100 Nutrient in Economic...
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...