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Reference data on the amount of nitrogen, phosphorus, and potassium carried away by common crops for every 100 kilograms of economic yield (grains, tubers, fruits, etc.) produced

Reference data on the amount of nitrogen, phosphorus, and potassium carried away by common crops for every 100 kilograms of economic yield (grains, tubers, fruits, etc.) produced
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Reference data on the amount of nitrogen, phosphorus, and potassium carried away by common crops for every 100 kilograms of economic yield (grains, tubers, fruits, etc.) produced

2026-08-17

This article shares reference data on the amount of nitrogen, phosphorus, and potassium carried away per 100 kilograms of economic yield produced by common crops. The article will also teach you step by step how to easily determine the fertilizer gap of your own plot through "nutrient balance calculation", so that every penny of fertilizer money is spent on the cutting edge.

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How to use this data for simple judgments? (Estimation Example)
Assuming you have a cornfield that produces 600 kilograms of seeds per mu this year.
1. Calculate the amount of nutrients taken away (in pure form):
Take the middle value: N 2.5 kg, P ₂ O ₅ 0.85 kg, K ₂ O 2.3 kg (per 100 kg of seeds) are required.
Total amount taken away:
Nitrogen=(600/100) × 2.5=15.0 kg/acre
Phosphorus=(600/100) × 0.85=5.1 kg/acre
Potassium=(600/100) × 2.3=13.8 kg/acre
2. Compare your fertilizer input (in pure form):
Assuming that you applied 50 kilograms of compound fertilizer (15-15-15) and 20 kilograms of urea per mu that year.
Calculate the net investment:
From compound fertilizer: N=P ₂ O ₅=K ₂ O=50 kg x 15%=7.5 kg each
■ From urea: N=20 kg x 46%=9.2 kg
Total investment: N=7.5+9.2=16.7 kilograms; P ₂ O ₅=7.5 kilograms; K ₂ O=7.5 kilograms.
3. Preliminary income and expenditure analysis and judgment:
Nitrogen (N): Input (16.7)>Take away (15.0), with a slight surplus in basic balance.
Phosphorus (P ₂ O ₅): Input (7.5)>Take away (5.1), with a significant surplus (phosphorus is prone to accumulate in soil).
Potassium (K ₂ O): Input (7.5)<Take away (13.8), resulting in a severe loss of approximately 6.3 kg/acre.
Conclusion: The potassium content in this plot is likely to be in a state of deficiency, which is an important reason why corn may be prone to lodging, incomplete grains, and decreased resistance. Next season's fertilization should focus on increasing the application of potassium fertilizer.