Soybean planted during the last week of April has now emerged across most of Iowa. The sunny and windy conditions last weekend led to stressful conditions for the soybean seedlings. However, soybean planted during the second week of May just before the last rain now show a tendency toward soil crusting that has delayed, and in some areas prevented, seedling emergence. Crusting is usually most noticeable in fields with high silt content, low organic matter, and little surface residue, especially where excessive tillage occurred.
Iowa State University
Pedersen, Palle, "Soil crusting across Iowa" (2005). Integrated Crop Management News. 1446.
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