Home Fruit Gardens: Table 1.1. Fertilizer Equivalents

Use this table to determine the equivalent amounts of nitrogen, phosphate, and potash of each fertilizer material.
Home Fruit Gardens: Table 1.1. Fertilizer Equivalents - Articles
Home Fruit Gardens: Table 1.1. Fertilizer Equivalents
Fertilizer MaterialChemical
Breakdown
%N
Chemical
Breakdown
%P2O5
Chemical
Breakdown
%K2O
Urea 464600.10
Ammonium sulfate2100
Diammonium phosphateb18460
Sodium nitrate1600
Calcium nitrate15.500
Potassium nitrate13045
Monoammonium phosphate11520
Blood1200
Cottonseed meal72.51.5
Steamed bonemeal5120
Complete fertilizers:
10-10-10101010
10-6-41064
5-10-1051010
5-10-55105

Example: 0.50 lb of cottonseed meal contains slightly more than half the N of potassium nitrate.
Caution: Be sure to check for the amount(s) of either P2O5 or K2O that fertilizer materials might carry. Do not overfertilize. Use only the amounts recommended.