棉花是我团的支柱产业，占耕地播种面积的７５％，其中，老棉区种植面积达４６％，老棉区一般连作棉花在５年以上，土壤板结严重，影响棉花增产。为提高老棉区棉花产量，我团积极推广应用了深松技术，从１９９７～１９９９年累计深松改土１５１３ｈｍ２，取得了较好的经济效益? Cotton is the pillar industry of our group, accounting for 75% of the sown area of ​​cultivated land, of which 46% are planted in the old cotton area and more than 5 years old in the old cotton area. The soil compaction is serious and the yield of cotton is affected. In order to improve cotton production in the old cotton area, our group actively promoted and applied the deep-well technique, and accumulated a total of 1513hm2 from deep-loosening and earth improvement from 1997 to 1999 and achieved good economic benefits.