The study looked at different types of winter wheat to see how they absorb and move nutrients like nitrogen, phosphorus, and potassium. They found that high-yield wheat varieties absorb more nitrogen and phosphorus after flowering, leading to better grain yields. These high-yield varieties also lose less potassium, which helps them save nutrients for grain production. Overall, the ability to absorb more nitrogen and phosphorus after flowering, and retain potassium, is key to achieving higher grain yields in dryland wheat varieties.