Split nitrogen applications provide no benefit over a single well timed application in rainfed winter wheat.

ABSTRACT: Optimizing nitrogen (N) fertilization strategies in winter wheat requires understanding the combination of application timings and rates. This is crucial for achieving the dual objectives of maximizing grain yield while maintaining adequate grain protein concentration (GPC). Research has been conducted in central Great Plains to document the value of a single delayed application on N. However, most of this work was performed at sub-optimum N rates, and without a comparison with split application. This study evaluated N fertilization across multiple site-years to identify optimal timing of split applications and single applications under sub-optimum and excessive N rates. Field experiments were conducted at three locations in Oklahoma across three growing seasons (2018-2021), testing two N

SUBMITTER: Abiola SO 

PROVIDER: S-EPMC12632810 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature