Improving winter wheat grain yield and nitrogen use efficiency using nitrogen application time and rate

Preplant nitrogen (N) application, which involves placing nutrients in the soil before seeding, has been an integral part of crop production systems for decades. Some producers are known to apply N at least 21 d planting. This may increase loss and lower grain yield. study evaluated effect timing rate application on winter wheat (Triticum aestivum L.) yield use efficiency (NUE). An experiment with a factorial arrangement treatments was set up randomized complete block design three replications. Treatments included four rates (0, 45, 90, 135 kg ha–1) each applied 7 or 30 planting, Feekes 5 (FK5). Grain analyzed using LECO CN dry combustion analyzer. The difference method [Grain from (fertilized plot – check plot)]/N used compute NUE. Nitrogen significantly affected (P ≤ .01). Although be temporally spatially variable, approximately 90 ha–1 required obtain yields that differ markedly check. Mid-season (FK5) had similar preplant two site-years increased one site 2020. Out sites, substantial NUE both years 0.11). In this case, by as much 9.5% midseason compared planting time.