The study aimed to find the best way to use water and nitrogen for growing spring wheat in a dry area in northwest China. By conducting field experiments in the Shiyang River basin, researchers discovered that using a nitrogen rate of 168 kg/hm2, along with specific irrigation amounts at different growth stages, led to higher wheat production. They found that nitrogen and water significantly affected wheat yield and dry matter accumulation, with the optimal model being a nitrogen rate of 168 kg/hm2, 90 mm of irrigation in the jointing stage, and 60 mm of irrigation in the tillering, heading, and filling stages.