Soybean Cultivar, Seeding Rate, and Row Spacing Trial
- Andrew Weaver (Iowa State University)
- Mark A. Licht (Iowa State University)
- Fernando Marcos (Iowa State University)
Abstract
Recommendations for soybean seeding rates have been targeted between 125,000 and 140,000 seeds per acre with the objective of targeting a final plant population of at least 100,000 plants per acre. It is also well understood that a 15-inch row spacing has approximately 4.5 bushel per acre higher yields than 30-inch row spacing. Even though this advantage has been identified the shift to 15-inch rows has not occurred. In recent years, 20-inch row spacing planters have become available Therefore, this trial was designed to begin to look seeding rate advantages in 20-inch rows compared to that of 15- and 30-inch row spacing.
How to Cite:
Weaver, A., Licht, M. A. & Marcos, F., (2026) “Soybean Cultivar, Seeding Rate, and Row Spacing Trial”, Iowa State University Research and Demonstration Farms Progress Reports 2025(1), 29-30.
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