The study looked at how different ways of adding nitrogen to watermelon plants affected their growth and fruit quality in a gravel-mulched field. They found that giving the right amount of nitrogen at different stages of growth helped the plants produce more fruit with better taste. By adjusting when and how much nitrogen was given, they were able to increase the yield and quality of the watermelons while also using the fertilizer more efficiently. This means that farmers can get better results with less work and make their fields more productive for longer.