Trial Type
Seeding Rate/ Varieties/ Row Spacing
General Stats
Soil Stats
Methodology
Treatment Information
The field was planted at 160,000 seeds ac-1 except for
three treatment strips, which were each seeded at
130,000 seeds ac-1.
Agronomic and Weather Information
Soybeans with a 1.5 maturity rating were no-tilled in 30” rows on May
20. The field was previously in soybeans. Seed was treated with
insecticide, fungicide, and a B.japonicum inoculant. The field received
approx. 4.78 in. of rain and accumulated 1739 GDDs from June 1
through August 31. This was drier and similar to the average of 9.15 in.
and 1715 GDDs.
Results
Results
The average of the four strips showed no significant yield difference at
the 95% CI. Therefore, reduced seeding rates may be an effective
method for reducing costs. These findings were in agreement with
2016 trials in Lincoln and Brookings Counties. However, lowering the
seeding rate may not be a good management practice on summit
positions, as evidence from 2016 SD trials suggests a 200k seeding rate
may be best. Additional trials are needed in 2017 to investigate.
