Planting options: What do we have in South Dakota?

SDSP and SDSU joined forces this spring to research the feasibility of interseeding soybeans in winter wheat and double cropping soybeans following oats-field peas. We worked with Lon Hall at SDSU on this research.

Interseeding

The interseeding soybeans into winter wheat do look promising. The basic data on planting follows. As we learn more about the research, we will update you.

The winter wheat plots were planted September 20, 2007 in 14” rows. Soybeans were interseeded into the winter wheat at early boot, which was in early June. They were planted in 30” rows. The wheat was harvested on August 1.  

Soybean maturities planted ranged from 0.8 to 2.0. Populations planted were 120,000 to 200,000.

Double Cropping

The wet spring and late planting season we had, show in the double cropping research project. The goal was to harvest the oats-field peas around June 20 and follow immediately with the soybeans. Due to the season we had, the soybeans were seeded on July 7, which is definitely late for planting soybeans in our area. This option in South Dakota, given our very variable spring weather, will be questionable.