The success of the deep loose plough machine s manufacture and the contrastive experiment proves that to adopt the technique of deep soft plough to plow and level the land can increase the thickness of cultivated land, economize labor and time, keep the structure of soil and prevent water and fertilizer from running off , save water and improve the environment of crop s growing up .

The effects of soil tillage depth and straw recycling model on growth, yield and yield components of crop, The physicochemical properties of soil, soil water content and the trait of potential weed communities were studied from 2005 to 2006 year.

In this paper, a series of field experiments were conducted to study the effect of different tillage depth and ridging mode on the agronomic characters, yield and quality of flue-cured tobacco.