Corn has been shedding pollen in all parts of Iowa, meaning that we are in the critical pollination/grain set phase of the season. As I wrote last week, "Thankfully, Iowa farmers in most places started the growing season with ample soil moisture reserves. As the month progresses, rain stress, especially if it is exacerbated by above-average temperatures, will be a continuing concern." We did have a slightly cooler than average week, which helps--but with only very scattered rainfall. Soybean fields in many areas are slow to close the rows, and rain would help there as well.
Iowa State University
Pope, Richard O., "Pollen shed!" (2007). Integrated Crop Management News. 1021.
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