在十年“浩劫”期间,我国的土地资源遭到了极大的破坏,许多地区不根据具体条件,片面强调“以粮为纲”的方针,乱伐森林,破坏草原,围垦湖泊,引起了大面积的水土流失,土壤砂化,次生潜育化与盐渍化,失去了原有的生态平衡。另一方面耕地面积不实,使国家难以正确的掌握资源情况。因此,在打削“四人帮”以后,国家领导就提出了要摸清土地资源,实行农业区划,扬长避短,因地制宜地发展农业,这就是我们目前进行第二次全国土壤普查的基础。但 During the “Holocaust” of the past decade, the land resources in our country have been greatly damaged. In many areas, the principle of “taking grain as the key link” is not emphasized on specific conditions. In many areas, deforestation, destruction of grasslands and reclamation of lakes have caused a large area Of soil and water loss, soil sanding, secondary gleization and salinization, lost the original ecological balance. On the other hand, the area of ​​cultivated land is not real, which makes it difficult for the country to correctly grasp the situation of resources. Therefore, after slashing the “gang of four,” national leaders have proposed that we should find out the resources of the land, carry out agricultural zoning, avoid weaknesses and develop agriculture according to local conditions. This is the basis for our current conduct of the second national soil survey. but