Page Content

You will get efficient and thoughtful service from Shuanglian.

Soil Fertility Guide

Calculating Fertilizer Rates from Nutrient Recommendations

Soil test recommendations are given in lb/ac or kg/ha of nutrients. 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.

Example 1

• 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

Example 2

• Recommended rate of P 2O 5 is 40 lb/ac Using 11-52-0, the rate of fertilizer required is:  (40 x 100) / 52 = 77 lb/ac 77 lb/ac of 11-52-0 would also supply (11/100) x 77 = 8.5 lb/ac of N.

Example 3

• Recommended rate of K 2O is 15 lb/ac. Using 0-0-60, the rate of fertilizer required is:  (15 x 100) / 60 = 25 lb/ac

Converting Fertilizer Prices into Price per unit of Nutrient

The cost of a fertilizer is related to its plant nutrient content. If a nitrogen fertilizer such as 34-0-0 is being purchased, the cost should be about three-quarters that of 46-0-0. When buying fertilizer, one should compare prices on the basis of cost per pound of "actual" nutrient, not the price per tonne of fertilizer material.

For more information, please visit TSP fertilizer 50kg/bag.

Example 1

If urea (46-0-0) costs $367/tonne, the cost per pound of nitrogen (N) is calculated as follows:

• Nitrogen in one tonne (1,000 kg or 2,204 lb) of 46-0-0 (containing 46% N):  (46/100) x 2,204 = 1,014 lb Cost per lb of N is:  $367/1,014 = $0.362

Example 2

(Based on 11-52-0 at $391/tonne)  In order to calculate the cost of phosphate in 11-52-0, the value of nitrogen must first be subtracted.

• Nitrogen in one tonne (1,000 kg or 2,204 lb) of 11-52-0 is (11/100) x 2,204 = 242 lbs The value of nitrogen is 242 x $0.362 = $88 (from example 1, which calculated the value of N to be $0.362/lb) Cost of phosphate per tonne is $391 - $88 = $303 Phosphate in one tonne (1,000 kg or 2,204 lb) of 11-52-0 is: (52/100) x 2,204 = 1,146 lb Cost per lb. of P 2O 5 is :  $303/1,146 = $0.264

For further information, contact your MAFRD GO Representative.

The company is the world’s best what is 18-46-0 fertilizer used for supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.