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土壤水流动系统是由水势场、介质场、水化学场、温度场耦合而成，并在时空四维上不断演变的动态系统。土壤水调控就是通过综合措施改善土壤水流动系统的上下边界条件及浅部介质特性，优化田间微水文系统、微气候系统及土壤水流动系统，使土壤水分、盐分、养分、温度、透气性等要素的时空分布有利于作物的生长，提高作物产量及土壤水利用效率。河北省王瞳试验表明，棉花畦种全盖膜较普通盖膜处理的水分生产率提高48％。采用畦种全盖膜和沟种全盖膜措施调控上壤水，较普通不采取措施处理增产籽棉50％以上。玉米深沟高垄盖麦秸处理平均产量为7566．6kg／hm2，水分生产率为2．34kg／m3，明显高于常规种法不盖麦秸处理。
Soil water flow system is a dynamic system made up of water potential field, media field, hydration field and temperature field, and evolving in space-time and four-dimension. Soil water regulation is to improve the upper and lower boundary conditions and shallow medium characteristics of soil water flow system through comprehensive measures to optimize the field micro-hydrological system, microclimate system and soil water flow system, so that soil moisture, salt, nutrients, temperature, air permeability, etc. Spatial and temporal distribution of the elements is conducive to crop growth, improve crop yield and soil water use efficiency. Wang pupil test in Hebei Province showed that the cotton mulching variety covered with plastic film had a 48% higher water productivity. The use of all kinds of species of all kinds of cover film and furrows cover the whole film measures to control the soil water, than the average does not take measures to deal with more than 50% of seed cotton yield. The average yield of maize deep-furrow and ridge-covered wheat straw was 7566.6kg / hm2 and the water productivity was 2.34kg / m3, which was significantly higher than that of the conventional straw-covered wheat straw.