The study looked at how lack of water and extra watering at different stages affected the growth and nutrient uptake of winter wheat. When there wasn't enough water, the wheat didn't grow as well and took up less nitrogen, phosphorus, and potassium. Water stress during tillering, jointing, and filling stages had the biggest impact. Adding water during jointing stage helped the wheat grow the most, increasing shoot weight and nutrient uptake. However, adding water during tillering stage actually decreased growth and nutrient uptake. Overall, adding water at different stages helped the wheat grow, but didn't always increase grain nutrient uptake. Adding water during winter and filling stages increased grain nutrient uptake, but adding water during jointing stage decreased it.