Analysis and Evaluation of Influencing Factors on Uniform Sowing of Wheat with Wide Seed Belt after Sowing and Soil Throwing Device

The uneven sowing of wheat on ground covered with rice straw in the rice–wheat rotation area middle and lower reaches Yangtze River has become a serious problem. Therefore, test bed for throwing soil after wide seed belt was designed, which could complete functions crushing, lateral concentration uniform at one time. discrete element simulation model established rotary blade shaft speed, guide plate angle retaining as variables. Taking variation coefficient depth uniformity evaluation indexes, effects three variables were analyzed by single factor Box–Behnken test. results observed that when rotating speed 260–300 rpm, 36°–48°, 58°–74° experiment utilizing covering device revealed good consistency effect. showed primary secondary factors affecting plate, shaft, plate. When 282.1 42.4° 65.5°, respectively, best seed-homogenizing At this time, coefficients field verification 4.35% 4.57%, 12.46% 12.73%, respectively. basically consistent those test, proved applying methods to optimize soil-throwing credible. This study provide theoretical reference structure optimization belt.