Sulfur (S) deficiency is becoming more common in Indiana crops because S emissions from coal-fired power plants have decreased over the past few decades and, thus, so has atmospheric S deposition.
Jim Camberato
Soybeans in Indiana often show potassium (K) deficiency symptoms during seed fill – leaf margin chlorosis to necrosis.
Excessive rainfall and flooding often result in the loss of applied and soil-derived nitrogen (N).
Providing sufficient but not excessive nitrogen (N) to corn is difficult especially with fall and early spring fertilizer applications where N loss can vary substantially with the timing of the application relative to the occurrence of warm soil and excessive rainfall.
Now that cleaner air has reduced the amount of sulfur acquired by plants and soil from rainfall or adsorbed directly from the air, sulfur deficiency of crops appears to be increasing.
Recent widespread flooding for weeks in northern Indiana has prompted questions and concerns about the potential negative effects on soil biology and other soil properties.
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Department of Entomology
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