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 |
Consumer Horticulture | Quick Reference
© Erv Evans, Consumer
Horticulturalist
Shoprights NC State University