During recent years, continuous cropping Soybean, lack of soil tillage and lack of effective herbicide for Perennial sowthistle caused Perennial sowthistle rampant.
近年来，由于大豆连作普遍、土壤耕作次数减少且无防除苣荬菜的特效药，导致大豆田苣荬菜的危害日趋严重。
2
Continuous ridge culture was the prerequisite, continuous capillary infiltration irrigation was the key, continuous Non-tillage was the guarantee and continuous crop plantation was the aim.