|
|
|
Interpretive Summaries:
Evaluation of Phosphorus Fertilizer Placement in Site-Specific Management of Corn, 1998
Within-field variability in soil test phosphorus (P) levels can be very high. Appropriate combinations of seed-placed and side-banded P fertilizer increase corn yields, but their optimum proportion depends on soil test P and other factors. This study was conducted to determine whether the variability of soil test P in a field could justify variable management of applied P.
Despite drought and wind stresses, the crop yielded well. Corn yield responded to both seed-placed and side-banded P. A combination of 80 lb/A side-banded and 18 lb/A seed-placed P2O5 produced 182 bu/A compared to 176 bu/A without applied P. It cannot be concluded whether variable management of applied P is justified until the spatial analysis of this trial is completed. ON-20
|
|
