Determine if soybeans inoculated with rhizobium can increase yield over native rhizobium populations under three different pH levels.
| Cooperator | Hoytville Branch, OARDC |
| County of Site: | Wood |
| Nearest Town: | Custer |
| Major Soil Type: | Hoytville |
| Drainage: | Tile |
| Tillage: | No-till |
| Previous Crop: | Wheat |
| Herbicides: | Roundup |
| Plant Population: | 175,000 |
| Variety: | Pioneer 9294 Roundup Ready |
| Planting Date: | 6/12/97 |
| Harvest Date: | 9/26/97 |
Soybeans were established on a Hoytville soil with three different pH levels, 5.2 to 5.3, 5.8 to 6.0, and 6.4 to 6.6 in the spring of 1997. The beans were treated with humus rhizobium inoculants of either USDA brand or HiStick Brand. An untreated check was included. The inoculum treatments were replicated eight times and the pH treatments were replicated four times. Individual inoculum plots were 10' x 40' in size.
| Treatment | Yield (bu/A) |
|---|---|
| pH 5.2 to 5.3 | 50.3 |
| pH 5.8 to 6.0 | 49.6 |
| pH 6.4 to 6.6 | 49.2 |
| USDA inoculant | 48.9 |
| HiStick inoculant | 50.0 |
| Check | 50.2 |
| LSD (p=.05) for pH treatments = 1.51 bu/A | |
| LSD (p=.05) for inoculant treatments = .77 bu/A | |
According to the results of this trial, there were no significant differences among the pH levels on the yield of soybean variety Pioneer 9294 Roundup Ready. There were significant differences among inoculant types with the USDA inoculant yielding lower than the other inoculant and the check treatment. There was no significant interaction (pH x inoculant) effect on soybean yield. The coefficient of variation (c.v.) for whole plots (pH) was 2.7% and the c.v. for split plots (inoculants) was 2.6%.
For additional information, contact:
Greg LaBarge
Ohio State University Extension - Fulton County
135 Courthouse Plaza
Wauseon, OH 43567
419-337-9210
labarge.1@osu.edu