Complex Fertilizer/Manure Dosage Calculator

This calculator is designed to help you calculate the dosage of a manure or fertilizer that contains two or more primary nutrients.


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Quantity required for meeting

Nitrogen

Kg

Phosphorous

Kg

Potassium

Kg

Quantity of Manure/Fertilizer required to satisfy the total requirement of all primary nutrients is
Kg

This will contain, of Nitrogen, of Phosphorus and of Potassium.

To calculate the dosage for simple fertilizers, please click here.

More about this tool.

What is a complex fertilizer/manure?

A complex fertilizer or manure is a type of fertilizer or manure that contains two or more primary plant nutrients. The primary plant nutrients are nitrogen (N), phosphorus (P), and potassium (K). Complex fertilizers are often used because they provide a balanced supply of nutrients to plants.

Complex fertilizers can be either inorganic or organic. Inorganic complex fertilizers are made from synthetic chemicals, while organic complex fertilizers are made from natural materials, such as manure or compost.

Some examples of complex fertilizers include:

  • NPK fertilizer: This type of fertilizer contains all three primary plant nutrients. The NPK ratio of a fertilizer tells you the percentage of each nutrient that is in the fertilizer. For example, a fertilizer with an NPK ratio of 10-10-10 contains 10% nitrogen, 10% phosphorus, and 10% potassium.
  • DAP fertilizer: This type of fertilizer is a diammonium phosphate fertilizer. It contains 18% nitrogen and 46% phosphorus.
  • MOP fertilizer: This type of fertilizer is a potassium chloride fertilizer. It contains 60% potassium.

Complex manures are also a good source of nutrients for plants. Some examples of complex manures include:

  • Chicken manure: This type of manure is a good source of nitrogen, phosphorus, and potassium.
  • Cow manure: This type of manure is a good source of nitrogen, phosphorus, and potassium.
  • Horse manure: This type of manure is a good source of nitrogen, phosphorus, and potassium.

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.