March 6, 2019
- In recent years there has been more interest in planting soybeans earlier in the planting season.
- The objective of this experiment was to evaluate the yield response of different maturity group soybean products across different seeding rates and planting dates.
Research Site Details
- Asgrow® soybean products and maturity groups (MG) planted in this trial:
- — AG49X6 brand, MG 4
- — AG56X8 brand, MG 5
- — AG64X8 brand, MG 6
- — AG74X8 brand, MG 7
- There were two different planting date categories, mid-May (PD1) and mid-June (PD2).
- Soybean products were planted at 80,000, 110,000, and 140,000 seeds/acre across locations and planting dates.
- Plots were single strip trials that were approximately 0.5 acres.
- Data was collected using Climate FieldView™, and all agronomic practices were per local standards.
Understanding the Results
- Results from this study are consistent with previous data showing that soybean yield potential is greater when soybeans are planted earlier. This year’s data showed, on average, as much as a 14 bu/acre yield advantage when soybeans were planted in mid-May vs. mid-June (Figure 3).
- In terms of seeding rate, when soybeans were planted in mid-May the 80,000 seeds/acre rate yielded the same or better than the higher seeding rates. In mid-June, the 110,000 seeds/acre rate yielded better.
- AG49X6 and AG56X8 brands had a much higher yield potential when planted in mid-May compared to AG64X8 and AG74X8 brands. Yield potential was similar across all products when soybeans were planted in mid-June.
What Does This Mean for Your Farm?
- Earlier planting dates for this trial had a higher yield potential than later planting dates.
- This trial showed that fewer seeds per acre are needed when soybeans are planted earlier.
- Consider testing different seeding rates on your own farm. Too many seeds per acre may actually reduce yield potential.