NITROGEN RATE FOR OPTIMAL YIELD IN SOFT RED WINTER WHEAT
Extension Educator and Professor
The Ohio State University Extension
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. New wheat varieties may require more nitrogen. The objective of this study was to determine the nitrogen rate for optimal yields for soft red winter wheat in northwestern Ohio. Dynagro 9042, a medium-maturity variety, was established in the fall of 2012 in an undisturbed field of soybean stubble on the OARDC Northwest Research Station near Custar, Ohio. Eight N rate treatments were applied as urea-ammonium nitrate at greenup: 0, 40, 60, 80, 100, 120, 140, and 160 pounds per acre. All treatments received 30 pounds of N per acre prior to planting. Experimental design was a completely randomized block replicated four times (N = 32). Analysis was a simple ANOVA. Grain yield, test weight, spike number, and N uptake (SPAD meter) were measured for each plot. Significant differences (p < 0.05) were observed among treatments for each measured agronomic trait. Grain yield increased with larger N rates until the 120 pounds per acre N rate. Yields were similar for the 120, 140, and 160 pounds per acre rate. Results from this study would suggest minimal yield benefits above the 120 pounds per acre N rate. An optimal N rate would exist between the 100 and 120 pounds per acre N rate.
Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
A poster file has not been provided
Authors: E.M. Lentz
Lentz, E. Educator, The Ohio State University Extension, Ohio, 45840