November 20, 2020
TRIAL OBJECTIVE
- XtendFlex® soybeans is a new trait platform available for farmers to plant in the spring of 2021.
- The objective of this trial was to help answer questions regarding the impact of planting rate on three Asgrow® brand XtendFlex® soybean products across two planting dates.
RESEARCH SITE DETAILS
Location | Gothenburg, NE | ||
Soil Type | Hord silt loam | ||
Previous Crop |
Corn | ||
Tillage Type |
Strip till |
Planting Date | 5/20/20 & 6/12/20 | ||
Harvest Date | 10/2/20 & 10/9/20 | ||
Potential Yield (bu/acre) |
80 | ||
Seeding Rate (seeds/acre) |
40K, 80K, 120K, 160K, 200K, 240K |
- This trial was a split plot design with planting date as the whole plot, seeding rate as the subplot, and soybean product as the sub-sub plot.
- Planting dates:
- May 20, 2020
- June 12, 2020
- Seeding rates:
- 40,000 seeds/acre
- 80,000 seeds/acre
- 120,000 seeds/acre
- 160,000 seeds/acre
- 200,000 seeds/acre
- 240,000 seeds/acre
- Asgrow® soybean products:
- AG23XF0 Brand
- AG25XF1 Brand
- AG27XF1 Brand
- Trial was sprinkler irrigated.
- Nutrient application included 27.5 lb N/acre, 15 lb S/acre, and 70 lb P/acre strip-till applied prior to planting.
- Weeds were controlled as needed and no additional fungicide or insecticides were used.
- The May 20 planting date was harvested on October 2 and the June 12 planting date was harvested on October 9. Total weight, test weight, and moisture content were collected to calculate yield per acre.
UNDERSTANDING THE RESULTS

- There was no significant interaction between seeding rate, soybean product, and planting date.
- The impact of seeding rate followed the trend of previous research where average soybean yields steadily increased from 40K to 120K seeds/acre and then leveled off (Figure 1).
- The 160K seeds/acre rate had the highest average yield with no increase in yield observed with the 200K or 240K seeds/acre rates (Figure 1).
- AG23XF0 Brand had the highest average yield at 75.5 bu/acre while the AG25XF1 Brand and AG27XF1 Brand yielded 72.1 and 74.4 bu/acre, respectively with an LSD (0.1) of 1.1. No difference in yield was observed from planting date with each date having an average yield of 74 bu/acre.

KEY LEARNINGS
- At this location, XtendFlex® soybeans planted around 160K seeds/acre helped maximize yield potential.
- Farmers should work with their Asgrow® brand sales and agronomic team to help identify the best adapted Asgrow® brand XtendFlex® soybean products for their production system.
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