Effects of nitrogen application rates on nitrogen uptake and utilization of direct-seeded cotton after wheat harvest. Emergence pattern of weed seedling community in direct-seeding cotton fields in the southwest of Anhui Province Population Production Capacity of Direct-Seeding Rice in Central Jiangsu Region and Effects of Nitrogen Application Experimental study on nitrogen leaching in a direct-seeding rice paddy of Taihu Lake Basin Effects of Wheat-Residue Application and Site-Specific Nitrogen Management on Growth and Development in Direct-Seeding Rice