Articles

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.

Updated:

July 18, 2016

Skip to the end of the images gallery

Home Fruit Gardens: Table 1.1. Fertilizer Equivalents

Skip to the beginning of the images gallery

Fertilizer Material	Chemical Breakdown %N	Chemical Breakdown %P₂O₅	Chemical Breakdown %K₂O
Urea 46	46	0	0.10
Ammonium sulfate	21	0	0
Diammonium phosphate^b	18	46	0
Sodium nitrate	16	0	0
Calcium nitrate	15.5	0	0
Potassium nitrate	13	0	45
Monoammonium phosphate	11	52	0
Blood	12	0	0
Cottonseed meal	7	2.5	1.5
Steamed bonemeal	5	12	0
Complete fertilizers:
10-10-10	10	10	10
10-6-4	10	6	4
5-10-10	5	10	10
5-10-5	5	10	5

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.

Agenda

Authors