October 29, 2020
TRIAL OBJECTIVE
- Previous research at the Bayer Crop Science Learning Center at Monmouth, IL would suggest the optimum seeding rate for corn is approximately 36,000 to 38,000 seeds per acre, depending on soil type and genetics.
- A study was conducted to determine if there is any advantage or disadvantage to planting different seeding rates in alternating rows compared to planting a uniform seeding rate in all rows.
RESEARCH SITE DETAILS
| Location | Monmouth, Il | ||
| Soil Type | Silt Loam | ||
| Previous Crop | Soybean | ||
| Tillage Type | Conventional tillage |
| Planting Date | 5/2/20 | ||
| Harvest Date | 10/8/20 | ||
| Potential Yield (bu/acre) | 250 | ||
| Seeding Rate (seeds/ac) | 36k |
- In this study, all plots were planted at a rate of 36,000 seeds/acre. However, there were two different seeding rate treatments:
- All rows evenly spaced at 36,000 seeds/acre.
- Seeding rate for each row alternated at 24,000 and 48,000 seeds/acre, for an average of 36,000 seeds/acre.
- Treatments were planted with a commercial planter equipped with individual row control precision technology.
- Each treatment had four replications.
UNDERSTANDING THE RESULTS
- For this study, no average yield differences were observed between the two different row arrangements, as well as no differences in test weight and grain moisture.
KEY LEARNINGS
- Interestingly, it was observed that the uniform seeding rate treatment had more ears, but they were smaller. The alternating row seeding rate had fewer, larger ears. Thus, the overall average grain yield was the same.
- Soil type, fertility levels, growing conditions, and genetics may impact the results when alternating seeding rates in individual rows.
- Consult your local Field Sales Representative or Technical Agronomist for tailored recommendations to fit your farm.
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