North Country Organics
Calculate Sulfur Application
LOWERING pH
CORRECTING SULFUR DEFICIENCIES
NOTE: Most labs test for sulfate sulfur (S) and do not include in their findings the S that exists in organic matter. Typically, crops grown in soils with 5% or more organic matter do not require additional S. Moreover, applications of sulfate materials, such as sulfate of potash, langbeinite, gypsum, and Epsom salt, provide plant available sulfur. Sulfate of potash contains 18% S, langbeinite contains 23% S, gypsum contains 19% S, and Epsom salt contains 13% S. To convert S/acre recommendations (in the table below) to sulfate (SO4)/acre application, multiply the S needs by 3.
Recommendations in ppa S
| CROP | YIELD | VL | L | M | H | VH |
|---|---|---|---|---|---|---|
| Alfalfa-seeding | 6T | 30 | 25 | 20 | 10 | 5 |
| Alt/Clover – est. | 8T | 30 | 25 | 20 | 10 | 5 |
| Barley | 100 bu. | 20 | 15 | 10 | 5 | 0 |
| Beans (dry) | 30 bu. | 20 | 15 | 10 | 5 | 0 |
| Coastal Bermuda | 8 T | 30 | 25 | 20 | 10 | 5 |
| Corn | 140 bu. | 20 | 15 | 10 | 5 | 0 |
| Cotton | 3 bales | 25 | 20 | 15 | 10 | 5 |
| Fruit Trees | all | 15 | 10 | 6 | 0 | 0 |
| Grass-seeding | 6T | 25 | 20 | 15 | 10 | 5 |
| Grass – est. | 6T | 20 | 15 | 10 | 5 | 0 |
| Oats | 100 bu. | 20 | 15 | 10 | 5 | 0 |
| Oats/Alf. – seeding | 6T | 30 | 25 | 20 | 10 | 5 |
| Onion | 400 cwt. | 25 | 20 | 15 | 10 | 5 |
| Pasture | 6T | 20 | 15 | 10 | 5 | 0 |
| Peanut | 50 cwt. | 25 | 20 | 15 | 10 | 5 |
| Peas | 3T | 20 | 15 | 10 | 5 | 0 |
| Potato | 400 cwt. | 25 | 20 | 15 | 10 | 5 |
| Rice | 70 cwt. | 20 | 15 | 10 | 5 | 0 |
| Rye | 60 bu. | 20 | 15 | 10 | 5 | 0 |
| Soybean | 50 bu. | 20 | 15 | 10 | 5 | 0 |
| Strawberry | all | 30 | 25 | 20 | 10 | 5 |
| Sugarbeet | 25T | 25 | 20 | 15 | 10 | 5 |
| Tobacco | 30 cwt. | 25 | 20 | 10 | 5 | 0 |
| Tomato | 500 cwt. | 25 | 20 | 10 | 5 | 0 |
| Wheat | 70 bu. | 20 | 15 | 10 | 5 | 0 |
| Average | 23.4 | 18.4 | 13 | 7 | 2.2 |