SIOUX FALLS, S.D. (AP) - The U.S. Department of Agriculture says nitrogen was applied to 88 percent of South Dakota's 150,000 sorghum acres in 2011.
The USDA's Agriculture Chemical Usage report says that only two states applied nitrogen at lower rates than South Dakota.
The state averaged 1.4 applications per acre treated, at a rate of 47 pounds per acre. Phosphate was applied to 45 percent of the sorghum acreage, averaging one application per acre at a rate of 28 pounds per acre.
Herbicide was applied on 89 percent of the 2011 sorghum acreage. The USDA says the most widely used herbicides were Glyphosate isopropylamine salt, Atrazine, S-metolachlor and Dimethenamid-P.
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