In recent years, sulfur (S) deficiency has been diagnosed in corn, soybean, alfalfa, and wheat in the Midwest, including Indiana and Michigan. There are a number of reasons why S deficiency appears to be more common, including reduced atmospheric S deposition, continued and increasing crop removal of S, higher amounts of crop residues, greater use of no tillage, and earlier planting into cool wet soils. It is wise to consider S deficiency as a cause of crop growth problems where yellowing of the foliage is the primary symptom.
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Fig 4. Sulfur deficient corn in the foreground (pale green) and
S sufficient corn in the background (dark green). Sulfur deficient
corn plants may show striping as well as an overall yellow color.
Image: RL Nielsen, Purdue University
