Application test of soybean sowing by variable fertilization seeder in Heilongjiang reclamation areas

In order to validate the feasibility and adaptability of planting soybean with the variable fertilization seeder, the application test of soybean sowing by ST820 air-transported variable fertilization seeder made by CASE company in America was carried out at No.2 field of No.2 brigade in No.5 branch of Youyi Farm in 2003. Before working, soil was sampled and tested. Variable rate fertilization and sowing were performed according to the testing results of soil nutrient and production experience. Then prescription data of variable rate fertilization were generated by AFS software and applied to soybean sowing work. The test result indicates that soybean sowing by variable fertilization seeder is technically available. But the variable fertilization seeder adopts whole profile modeling, and its working width is large, so the field must be level, otherwise planting depths are different from each other, which has an effect on the accordance of soybean emergence.