The researchers studied how changing the spacing between rows and the amount of seeds planted affects the way winter wheat plants use sunlight to grow. They found that using wider and narrower row spacing increased the amount of sunlight absorbed by the middle and lower parts of the plant, leading to better growth and higher grain yield. Increasing the amount of seeds planted also resulted in more biomass and larger grains. Overall, changing row spacing and sowing rate can improve the way winter wheat plants use sunlight, leading to higher crop yields.