This time of year, soybeans may begin showing signs of chlorosis or other leaf discoloration in all or parts of the field. There may be many causes of discoloration. Nutrient deficiencies are one possibility.
With my wife, Carrie, and son, Alex, we’re fifth and sixth generation farmers. When we got into strip-till and no-till, it was shortly after we ran into Ray Rawson at the National Farm Machinery Show in Louisville.
Source: By Antonio P. Mallarino, Department of Agronomy, Iowa State University
Some corn and soybean fields, mainly in eastern and southern Iowa, are showing potassium deficiency symptoms, even when growth stages range from V3 to V8.
Crop producers may have shied away from making phosphorus or potassium applications last year due to high fertilizer prices, but don’t let bumper corn and soybean yields fool one into thinking an application this fall may not be needed.
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