Barry Ward, Extension Agriculture and Natural Resources Agent
Ed Lentz, Extension Agronomy Specialist
To determine yield and moisture differences in conventional soybean production systems vs. Roundup Ready soybean systems.
| Cooperator: | Marion H.S. FFA | Herbicides: | POST - 1.25 pt Flexstar, | |
| County of Site: | Marion | 0.2 oz Firstrate, 8 oz Fusion | ||
| Nearest Town: | Marion | COC 1% v/v, 28% N 2% v/v | ||
| Major Soil Type: | Milford | POST on RR soybeans - | ||
| Planting Date: | 6/2/98, No-till Drill | 1 qt/A Roundup Ultra | ||
| 7" rows |
Two varieties of Roundup Ready soybeans were planted in a randomized complete block experiment with two varieties of conventional soybeans from the same seed company. Four replications were used of each variety in 25' x 175' side by side strips.
| Yield (13.0% moisture) bu/A | Harvest Moisture % | |
|---|---|---|
| Pioneer 9396RR | 51.04 | 12.2 |
| Pioneer 92B51RR | 50.26 | 12.1 |
| Pioneer 9395 | 49.30 | 12.0 |
| Pioneer 9245 | 52.87 | 11.9 |
| F-Test | 1.18 | 0.76 |
| Significance (P = 0.05) | NS | NS |
| CV | 5.5% | 2.8% |
Differences were noted in the overall appearance of the bean plants after post applications of conventional herbicide program. Plant foliage of conventional soybeans was noticeably burnt by Roundup drifting from adjacent Roundup Ready plots. No significant differences were found in yields among the four varieties, and no differences were detected between the conventional soybeans and Roundup Ready soybeans.
For additional information, contact:
Barry Ward
Ohio State University Extension, Marion County
1100 East Center Street
Marion, OH 43302
(740) 387-2260
ward.8@osu.edu