论文部分内容阅读
土壤侵蚀已经导致了美国棉花生产地区棉花产量的下降。为控制土壤侵蚀 ,于 1 996～ 1 998年间在美国阿拉巴马 (Ａｌａｂａ ｍａ)州ＢｅｌｌｅＭｉｎａ阿拉巴马农业试验站开展了一项研究。研究包括三种处理方法 :传统耕作方法、覆盖耕作和免耕 ;两种作物配置系统 :一种是冬棉花
Soil erosion has led to a decline in cotton production in the United States cotton-producing areas. To control soil erosion, a study was conducted between 1996 and 1998 at BelleMina, Alabama Agricultural Experiment Station, Alaba ma, USA. The study includes three treatment methods: traditional tillage method, covering tillage and no-tillage; two crop arrangement systems: one is winter cotton