Irrigation allows later plantings of these early soybeans. However, the full yield potential may not be realized when planted late. 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 variety, 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 Group V and Group VI can be made in April. Delays in planting usually result in reduced yield potential for almost all varieties in all maturity groups. Compare these characteristics to other varieties, conventional and herbicide-resistant. Consider seed premiums and technology fees as cost components of your weed control program.