Fertilizer Calculator
Calculate fertilizer requirements based on soil tests and crop needs
Frequently Asked Questions
What is N-P-K in fertilizer?
N-P-K represents Nitrogen, Phosphorus, and Potassium – the three primary nutrients plants need. The numbers on fertilizer bags (e.g., 10-10-10) indicate the percentage of each nutrient by weight.
Why is soil testing important?
Soil testing reveals existing nutrient levels, pH, and organic matter content. This prevents over-fertilization, saves money, reduces environmental impact, and ensures crops receive only what they need for optimal growth.
When should I apply fertilizer?
Timing depends on crop type and growth stage. Generally, apply nitrogen when plants actively grow, phosphorus at planting for root development, and potassium before flowering or fruiting stages.
How do I choose the right fertilizer grade?
Select fertilizer based on soil test results and crop requirements. Match the N-P-K ratio to your deficiencies. For example, use high-nitrogen formulas for leafy crops and high-phosphorus for root vegetables.
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