Trial Type
N Fertilizer
General Stats
Soil Stats
Methodology
Two strips of ESN were applied at 75 lbs. N/acre to soybeans planted in 15 in. wide rows on June 26, 2014 when the crop was at the V4 growth stage. The site received approx. 11.4 in. of rain and accumulated 1564 GDD’s from June 1 through August 31. This was approximately 0.3 in. more precip. and 104 less GDD’s than the 30 yr. avg.
Results
Overall, there was a 5.3 bu/ac yield response to ESN (Table 1). Soybeans grown on the Vienna- Brookings complex with some degree of slope appeared most responsive. ESN costs approximately $525 perton. Applying this rate could cost close to $45/acre in product alone. These results show that economical yield response may be predictable, which could warrant a precision application. Future studies are needed to confirm this concept and develop management zones for possible precision applications.
Rainfall
Temperature
Applications
| Event Date | Type | Application Method | Amount | |
|---|---|---|---|---|
| V(n) | 26/06/2014 | N | Surface broadcast | 75 lbs / acre (actual) |
Fertilizer Applications
| Event Date | Type | Application Method | Amount | |
|---|---|---|---|---|
| V(n) | 26/06/2014 | N | Surface broadcast | 75 lbs / acre (actual) |