According to research conducted in South Dakota, soybean yield loss was 8 to 9% when volunteer corn density was about one plant per ten square feet. Yield loss increased to 71% at volunteer corn densities of about one plant per square foot.

Typically, corn shows a greater response to starter fertilizer than soybean. Part of the reason for that is that soils are generally warmer when soybeans are planted than when corn is planted. The typical response in early growth observed in corn is usually not observed in soybeans. However, yield response to direct soybean fertilization with phosphorus and other nutrients can be expected in low-testing soils.

USDA's crop progress report for the week ended May 1 reported 14% of corn crops and 8% of soybeans have been planted.

Although overwintering beetle populations are expected to be lower than last year throughout much of the state, it is important to scout for this pest.

The report shows prospective soybean plantings are greater than prospective corn plantings for the first time in at least two decades.