免耕法是近三十多年来在一些工业发达的国家随着现代化大农业的发展而兴起的。现已为世界各国普遍重视。 棉花免中耕早在1924年美国人Blackwell和Buic在南卡罗来纳研究指出“棉作不行中耕仅用锄将杂草除去,其产量约和棉作进行中耕的相同”;1929年BledSoe在乔治亚研究认为“不中耕(杂草用锄锄净)的较中耕的棉作得到较高的产量”;一些国外植棉家也认为“中耕只是为了除草才需要进行,并且行间耕作除了除草的重要性外,就没有得到其他报酬”。我国 No-till law has emerged in some industrialized countries in recent thirty years with the development of modern large-scale agriculture. It is now universally valued by all countries in the world. Cotton Free Tillage As early as 1924, the American Blackwell and Buic studies in South Carolina pointed out that “cotton is not cultivated and weeds are removed only by hoes and the yield is about the same as for cotton cultivation”; in 1929 BledSoe in Georgia said “ Some cultivars in foreign countries also believe that ”cultivation only needs to be carried out for weeding, and in addition to the importance of weeding in inter-row farming, There is no other reward. " My country