Fertilizer Calculation Made Simple for Farmers

 

👋 Introduction

Fertilizer is one of the biggest investments in farming. Using too much wastes money 💸 and damages soil 🌍, while using too little reduces yield 🌾.
That’s why fertilizer calculation is important, it helps farmers apply the right dose, at the right time, in the right way.



🧮 Step 1: Crop Requirement

Every crop needs a certain amount of N (Nitrogen), P (Phosphorus), K (Potassium).

📌 Example:
👉 Paddy → 100:50:50 NPK per acre

🧪 Step 2: Fertilizer Nutrient Content

FertilizerNutrient Content
Urea46% Nitrogen (N)
DAP18% N + 46% P₂O₅
MOP60% K₂O
SSP16% P₂O₅ + 11% S
Ammonium Sulphate20% N + 24% S

🔢 Step 3: Fertilizer Calculation Formula


​

✅ Example for Paddy (per acre):

  • Nitrogen (100 kg N) → Urea (46% N): 217 kg

  • Phosphorus (50 kg P₂O₅) → DAP (46% P₂O₅): 109 kg

  • Potassium (50 kg K₂O) → MOP (60% K₂O): 83 kg

📊 Quick Fertilizer Reference Table

CropNPK Requirement (kg/acre)Fertilizer Equivalent
Paddy100:50:50217 kg Urea + 109 kg DAP + 83 kg MOP
Wheat120:60:40261 kg Urea + 130 kg DAP + 67 kg MOP
Maize100:60:40217 kg Urea + 130 kg DAP + 67 kg MOP
Sugarcane150:60:60326 kg Urea + 130 kg DAP + 100 kg MOP
Cotton75:40:40163 kg Urea + 87 kg DAP + 67 kg MOP
Pulses20:40:2043 kg Urea + 87 kg DAP + 33 kg MOP

📋 Crop-wise NPK Fertilizer Recommendations

🌾 Cereals

  • Paddy (Rice): 100 : 50 : 50 kg NPK

  • Wheat: 120 : 60 : 40 kg NPK

  • Maize: 100 : 60 : 40 kg NPK

  • Sorghum (Jowar): 80 : 40 : 40 kg NPK

  • Bajra (Pearl Millet): 60 : 30 : 20 kg NPK

  • Barley: 60 : 30 : 20 kg NPK

🌱 Pulses

  • Pigeonpea (Arhar/Tur): 20 : 50 : 25 kg NPK

  • Chickpea (Gram): 20 : 40 : 20 kg NPK

  • Blackgram (Urad): 20 : 40 : 20 kg NPK

  • Greengram (Moong): 20 : 40 : 20 kg NPK

  • Lentil: 20 : 40 : 20 kg NPK

🌿 Oilseeds

  • Groundnut: 25 : 50 : 75 kg NPK

  • Soybean: 20 : 60 : 40 kg NPK

  • Mustard: 60 : 40 : 20 kg NPK

  • Sunflower: 60 : 60 : 40 kg NPK

  • Sesame: 40 : 20 : 20 kg NPK

🍬 Commercial / Cash Crops

  • Sugarcane: 150 : 60 : 60 kg NPK

  • Cotton: 75 : 40 : 40 kg NPK

  • Jute: 40 : 20 : 40 kg NPK

  • Tobacco: 80 : 40 : 80 kg NPK

🥦 Vegetables

  • Potato: 120 : 80 : 100 kg NPK

  • Tomato: 100 : 50 : 50 kg NPK

  • Onion: 80 : 40 : 40 kg NPK

  • Brinjal (Eggplant): 100 : 50 : 50 kg NPK

  • Cabbage/Cauliflower: 100 : 60 : 60 kg NPK

  • Chilli: 80 : 40 : 40 kg NPK

🍌 Fruits (per acre orchard, average for mature trees)

  • Banana: 200 : 100 : 200 kg NPK

  • Mango: 100 : 100 : 100 kg NPK

  • Citrus (Orange, Lemon): 200 : 100 : 100 kg NPK

  • Papaya: 150 : 100 : 150 kg NPK

  • Grapes: 160 : 120 : 120 kg NPK

🖥 Interactive Fertilizer Calculator

🌾 Fertilizer Calculator Tool

Enter crop requirements and get instant fertilizer equivalents 👇







Result:

🔗 Share this page:


👉 After you paste this, readers can enter crop nutrient needs → it instantly shows how many kg Urea, DAP, MOP are needed.

✅ Best Practices

✔ Do soil testing before deciding doses
✔ Apply nitrogen in split doses
✔ Mix organic + inorganic fertilizers
✔ Use biofertilizers for pulses & cereals
✔ Follow 4R principle → Right Source, Right Dose, Right Time, Right Place

🌟 Conclusion

Correct fertilizer calculation = higher yield, lower cost, healthy soil.
At AgroIndia, we aim to make farming knowledge easy, practical, and farmer-friendly.

💬 Comment your crop below, and we’ll help calculate your fertilizer dose!

Comments

Post a Comment