Did you know that optimizing nitrogen (N) fertilization is crucial for both crop yield and economic efficiency? While excessive N might not boost grain yield significantly, it does affect grain protein levels, which can indicate whether your N supply was optimal. For feed wheat, aiming for a protein level of about 11% (or 1.9% N in grain dry matter) is ideal. Grain protein below this suggests insufficient N, while higher levels indicate over-application. Adjusting N based on a 1% change in protein requires about 50 kg/ha of N. Regularly analyzing grain protein from different fields over the years can help refine your N management strategy, ensuring you use fertilizers effectively and sustainably.