Cool, wet soils at planting may justify the use of a seed treatment that has activity against Pythium , since no varieties have resistance to infection and resulting damage from this organism. The Maturity Group IV soybeans that have been performing well in early season production have a narrow growth habit and narrow rows will be advantageous. Timely harvest is crucial with the early-maturing varieties because dry weather at maturity may promote shattering. There is a large range in maturities in the Group IV soybeans. Determine if an early Group IV or a late Group IV or some acreage of both would fit into your planned harvest schedule.
Timely planting is crucial for optimum production of all maturity groups of soybeans.
An attempt should be made to complete soybean planting as early as possible. Plantings of MG V and VI can be made in April. Delays in planting can result in reduced yield potential for almost all varieties in all maturity groups. The experimental design at each location was a randomized complete block of each maturity group, with three replications of each entry. Plots were 4 rows 30 inches wide and 20 feet long.