苏联土壤改良事业的发展,尤其在当前,非黑土地带土壤改良,以新的要求提出了土壤改良调节的任务。因为,越来越普遍要求不仅能调节地下水位,而且也能调节根系层土壤水分状况的疏干——湿润系统。其次,迫切要求精确调节土壤水分状况,正如试验证明,在关键时刻偏离最优状况将造成农作物大幅度减产。这就确定了一些研究部门目前的研究方向(这些部门是:全苏水利技术与土壤改良 The development of soil improvement in the Soviet Union, especially in the current non-black soil improvement, put forward the task of soil improvement and adjustment with new requirements. Because, more and more, it is more and more dewatering-wetting system that can not only regulate the groundwater level but also regulate the soil moisture in the root system. Second, there is an urgent need for accurate regulation of soil moisture conditions, as experiments have shown that deviating from the optimal situation at the critical moment will result in a substantial crop yield reduction. This confirms the current research direction of some research departments (these are: Quan Su Water Technology and Soil Improvement