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Postash Widely Used on Minnesota Soybeans
Minnesota Ag Connection - 05/16/2018

The 2017 Agricultural Chemical Use Survey of soybean producers collected data about fertilizer and pesticide use as well as pest management practices in growing soybeans.

Fertilizer refers to a soil-enriching input that contains one or more plant nutrients, primarily nitrogen (N), phosphate (P2O5), and potash (K2O). Of the three primary macronutrients, potash was the most widely used on soybean acres planted in Minnesota according to the latest USDA, National Agricultural Statistics Service -- Agricultural Chemical Use report. Minnesota farmers applied potash to 34 percent of planted acres at an average rate of 59 pounds per acre per year. Macronutrients nitrogen and phosphate were applied to 26 and 28 percent of soybean acres, at an average rate of 16 and 59 pounds per acre per year, respectively. The secondary macronutrient, sulfur, was applied to 6 percent of acres planted to soybeans.

The pesticide active ingredients used on soybeans are classified in this report as herbicides (targeting weeds), insecticides (targeting insects), fungicides (targeting fungal disease) and other chemicals (targeting all other pests and other materials, including extraneous crop foliage).

Herbicide active ingredients were applied to 94 percent of the soybeans planted. Fomesafen sodium and sulfentrazone were the most widely used pesticides overall, however glyphosate potassium salt was the active ingredient with the greatest total amount applied. Fungicide and insecticide active ingredients were applied to 13 and 38 percent, respectively, of soybean acres planted in Minnesota.

Scouting for weeds was the top pest management practice on soybean acreage in Minnesota.

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