ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

85%,。 A new no-till seeder, named 2BMX-5 no-till wheat-maize seeder, has been developed by China Agricultural University to solve the new problem of no-till seeder which the openers was braded that led to increase soil disturbance and fuel consumption in the area of one crop per year of North China. The wedge-shaped with front knife no-till opener consisted of front blade and pedestal and new driving device have been designed, and the split front blade was also designed. Field performance test was made in the field covered with wheat and rice residue in Inner-Mongolia and Ningxia. The results showed that the machine worked well without blockage and the depth of seeding and fertilizing could satisfy the agronomic requirement. Anti-blockage was improved and soil disturbance was decreased after adopted the wedge-shaped with front knife no-till opener. The seeding quality has been improved, and the results showed the cut stubble ratio was over 85 percent in the field covered with rice stubble.