## Best answer

HOW TO CALCULATE FERTILIZER RATES For solid fertilizers, you can use the following formula :Fertilizer rate = required nutrient application rate X 100 / % nutrient in the fertilizer

## People also ask

### How do I use the fertilizer calculator?

This calculator can be used to determine how much nitrogen (N), phosphorus (P 2 O 5 ), and potassium (K 2 O) (in lbs./1000 ft.) the fertilizer analysis you choose will supply. If your fertilizer recommendations are in lbs/100 sq ft, you will need to divide the result you get by 10.

### How do you calculate nitrogen and phosphorus in fertilizer?

N = 80 x 12 / 100 = 9.6 kg per 5 hectares or 9.6/5 = 1.92 kg/ha nitrogen Calculating the phosphorus application rate: For liquid fertilizers, the weight of the fertilizer must be accounted for, because the fertilizer nutrient content is given as percentage by weight.

### What is the ratio of nutrients in fertilizer?

When dealing with fertilizer there are two things that are important: the actual amount (the weight) and the ratio of nutrients. The ratio is the relative amount of each nutrient. In the two examples above, there is an equal amount of each nutrient and so the ratio is 1:1:1 for both of them.

### How to calculate the phosphorus application rate?

Calculating the phosphorus application rate: For liquid fertilizers, the weight of the fertilizer must be accounted for, because the fertilizer nutrient content is given as percentage by weight. For example, Urea Ammonium Nitrate (UAN), a liquid fertilizer with a grade of 30-0-0 contains 30% nitrogen by weight.