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Frequently Asked Questions

How to calculate a fertilizer ratio?

To determine a fertilizer ratio for a recommendation of 1.5 lb of nitrogen, 0.5 lb of phosphate, and 0.5 lb of potash, divide the weight of each of the three nutrients (1.5 lb, 0.5 lb, 0.5 lb) by the nutrient with the lowest weight (0.5 lb). Thus, the fertilizer ratio that best fits this recommendation is 3-1-1 .

What do the three numbers on fertilizer mean?

All fertilizer labels have three bold numbers. The first number is the amount of nitrogen (N), the second number is the amount of phosphate (P2O5) and the third number is the amount of potash (K2O). These three numbers represent the primary nutrients (nitrogen(N) - phosphorus(P) - potassium(K)).

How do you calculate fertilizer rates?

To determine the fertilizer rate for a particular nutrient, multiply the rate of the desired nutrient by 100 and divide by the percentage of the nutrient in the fertilizer. Recommended rate of N is 80 lb/ac Using 46-0-0, the rate of fertilizer required is: (80 x 100) / 46 = 174 lb/ac.

What is the formula for fertilizer?

Ammonium nitrate is a chemical compound, the nitrate salt of the ammonium cation. It has the chemical formula NH4NO3, simplified to N2H4O3. It is a white crystal solid and is highly soluble in water. It is predominantly used in agriculture as a high-nitrogen fertilizer.

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