Our persistent wet weather has resulted in delayed and prevented planting. This week Laura Lindsey, OSU Extension Wheat and Soybean production specialist provides the following management recommendations for late-planted soybeans:
Row spacing. The row spacing for June planting should be no greater than 7.5-inch if possible. Row width should be narrow enough for the soybean canopy to completely cover the interrow space by the time the soybeans begin to flower. The yield benefit of narrow rows increases as planting date is delayed to later season.
Seeding rate. Higher seeding rates are recommended for June plantings. Data from previously conducted seeding rate trials, suggest seeding rates between 200,000-225,000 seeds/acre when planting the first half of June.
Relative maturity. For June planting dates, plant the latest maturing variety that will reach physiological maturity before the first killing frost. This is to allow the plants to grow vegetatively as long as possible to produce nodes where pods can form before vegetative growth is slowed due to flowering and pod formation. The recommended relative maturity ranges for northern Ohio are 3.2-3.8 for June 1-15 planting dates, 3.1-3.5 for June 16-30 planting dates and 3.0 -3.3 for July 1-10 planting dates.