Group 1 - The main crops for summer grain and oil in China are winter wheat entering the filling stage, winter rapeseed being harvested, and corn and rice spring sowing reaching its peak [1] - In Northeast China, nearly 30% of spring grain has been sown, with high-performance seeders being promoted to enhance agricultural production efficiency [2] - In Heilongjiang, a new type of air-suction seeder has improved sowing speed and precision, with techniques like deep burying 70% of straw to enhance soil fertility [4] Group 2 - The area of winter rapeseed in China has reached 110 million mu, showing a stable increase [7] - In Jiangxi Province, the rapeseed planting area is over 9 million mu, benefiting from favorable weather conditions, leading to good growth [7] - In a cooperative in Jiangxi, the average yield of rapeseed has increased from 150 jin per mu to about 200 jin due to the adoption of the "rice-rice-rapeseed" rotation model [9] Group 3 - In Nanchang, a two-stage harvesting method is being promoted to reduce seed loss during rapeseed harvesting [11] - In Hunan's Yuanjiang, over 500,000 mu of rapeseed is maturing, with farmers rushing to harvest due to favorable weather, expecting yields to exceed 300 jin per mu [14] - The comprehensive benefits of rapeseed planting in Yuanjiang have increased by over 30% due to the promotion of quality seeds and techniques [15]