Fertilizer Dosage Calculator

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Urea

Kg

SSP

Kg

MOP

Kg

Recommendation

Total Area

Urea

Kg

DAP

Kg

MOP

Kg

Recommendation

Total Area

To calculate the dosage for complex fertilizers or manures, please click here.

More about this tool.

How to find the right fertilizer ratio for your soil?

The most accurate way to find the fertilizer ratio is to get a soil test and use the STCR (Soil Test Crop Response) method. However, if this is not possible, you can use a blanket recommendation. Blanket recommendations are general guidelines for fertilizer ratios based on the type of crop and soil. You can find these recommendations online or from your local extension office. Once you have the blanket recommendation, enter it into our calculator to calculate the exact amount of fertilizer you need.

What do you mean by recommended fertilizer ratio for a plant?

The recommended fertilizer ratio is the ideal balance of nitrogen (N), phosphorus (P), and potassium (K) for a particular plant. The ratio will vary depending on the type of plant, its stage of growth, and the soil conditions. For example, a flowering plant may need a higher ratio of phosphorus than a leafy plant. Or, a plant that is growing in sandy soil may need a higher ratio of potassium than a plant that is growing in loamy soil.
The best way to determine the recommended fertilizer ratio for your plants is to get a soil test. A soil test will tell you the nutrient levels in your soil and help you determine which nutrients your plants need.

What are the percentages of nitrogen, phosphorus, and potassium in the fertilizers Urea, SSP, DAP, and MOP?

Fertilizer Nitrogen (N) Phosphorus (P) Potassium (K)
Urea 46% 0% 0%
SSP 0% 16% 0%
DAP 18% 46% 0%
MOP 0% 0% 60%