Soft Red Winter Wheat Response to Nitrogen Rate in a High Yield Environment
Applied Research
Edwin Lentz
Extension Educator and Professor
The Ohio State University Extension
Findlay
Abstract
Producers rely on university research to apply the proper rate of nitrogen for optimal wheat yields and to reduce the risk of nutrient loss into the environment. Few nitrogen rate studies have been completed in recent years in the Eastern Corn Belt. The objective of this study was to determine the nitrogen rate for optimal yields for soft red winter wheat at this location. AGI 217B, a medium-maturity variety, was established in the fall of 2020 on the OARDC Northwest Agricultural Research Station near Custar, Ohio. Seven nitrogen rate treatments were applied as urea-ammonium nitrate between greenup and early stem elongation (Feekes Growth Stage 6). Rates included in the study were 0, 40, 70, 90, 110, 130, and 150 pounds per acre. All treatments received 30 pounds of nitrogen per acre prior to planting. Experimental design was a completely randomized block replicated four times. Analysis was a simple ANOVA. Grain yield, test weight, and spike number were measured for each plot. Yields were 69, 72, 112, 122, 125, 126, and 131 bushels per acre for the 0, 40, 70, 90, 110, 130 and 150 nitrogen rates, respectively. The trend was for grain yield to significantly increase with larger nitrogen rates, p<0.10. Yields were similar for 90 and 110 treatments and similar for the 110 and 130 treatments. However, the 150-pound treatment was significantly larger than the lower rates suggesting that yield may have increased with more nitrogen. Thus, an optimum rate was not conclusive for this site for this year.
Poster has NOT been presented at any previous NACAA AM/PIC
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Authors: Edwin Lentz
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Lentz, E. Extension Educator and Professor, Ohio State University Extension - Hancock County, Ohio, 45840