Conversion of Fertilizer Weights to Approximate Volumes

Fertilizer Cups/Pound Tablespoons/Pound
Ground limestone 1 1/2 24
Nitrate of soda 1 1/2 24
Potassium sulfate 1 1/2 24
Calcium nitrate 2 32
Superphosphate 2 1/4 36
10-10-10 2 1/4 36
5-10-10 2 1/2 36
Borax 2 3/4 44
Ammonium nitrate 2 1/2 40
Epsom salts 2 1/2 40
Aluminum sulfate 2 3/4 44
Hydrated Lime 4 64

Rates of Application of Different Fertilizer Formulas
Fertilizer Formula 1,000 Sq. Ft. 10 ft. Single Feet 10ft. Wide Bed Single Plant
5-10-5 40 lbs. 2 cups 6 cups 3 tbsp.
8-32-16 25 lbs 1 1/2 cups 4 1/2 cups 2 tbsp.
10-6-4 20 lbs 1 cup 3 cups 1 1/2 tbsp
12-12-12 17 lbs. 1 cup 3 cups 1 1/2 tbsp.

Recommended Application Rate for Various Granular Fertilizers in the Landscape to Apply 1 Pound of Nitrogen

 
1,000 Square Feet
100 Square Feet
10 Square Feet
Source
Pounds
Cups
Pounds
Cups
Tablespoons
10-10-10 10 20 1 2 4
8-8-8 12.5 25 1.2 2.5 5
12-4-8 8 16 .75 1.5 3
16-4-8 6 12 .5 1 2
5-10-10 20 40 2 4 8
12-6-6 8 16 .75 1.5 3


Pounds of Fertilizer Needed per 1,000 Square Feet to Supply Various Amounts of Nitrogen

N-P-K
1 Pound Actual Nitrogen
1 1/4 Pound Actual Nitrogen
1 1/2 Pounds Actual Nitrogen
3 Pounds Actual Nitrogen
45-0-0 (urea) 2.2 2.7 3.3 6.5
33-0-0 (ammonium nitrate) 3.3 3.7 4.5 9.1
27-7-7 3.7 4.6 5.6 11.1
21-0-0 (ammonium sulfate) 4.8 5.9 7.1 14.3
20-20-20 5.0 6.2 7.5 15.0
16-4-8, 16-8-8 6.2 7.8 9.4 18.8
15-5-5 6.7 8.3 10.0 20.0
12-4-8 8.3 10.4 12.5 25.0
10-10-10 10.0 12.5 15.0 30.0
5-10-10, 5-10-5 20.0 25.0 30.0 60.0


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© Erv Evans, Consumer Horticulturalist
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