Calculate Sulfur Application

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
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