soil moisture 1. Water stored in soils. 2. One of the most important elements involved in pedological processes and plant growth. There are three basic forms: 1. water adhering in thin films by molecular attraction to the surface of soil particles and not available for plants is termed hygroscopic water. 2. Water forming thicker films and occupying the smaller pore spaces is termed capillary water. Since it is held against the force of gravity it is permanently available for plant growth and it is this type of soil water which contains plant nutrients in solution. 3. Water in excess of hygroscopic and capillary water is termed gravitational water, which is of a transitory nature because it flows away under the influence of gravity. When the excess has drained away the amount of water retained in the soil is termed its field capacity, when some of its pore spaces are still free of water(1. 土壤中的储水。 2. 一个在土壤学和植物生长过程中所涉及的最重要因素。有三种基本形式：1.黏附在薄膜上的水被分子吸附到土壤颗粒的表面。b.水形成较厚的薄膜占据更小空间被称为毛细管孔隙水。它是与重力作用相反，永恒地为植物生长起作用，这种类型的土壤水分含有溶解的植物营养素。 c.吸湿和毛细管中多余的水被称为重力水，是一个过度性质的，因为它的流动受到了重力的影响。当过量外流的水耗尽了土壤中保持的水，被称为它的领域能力，当空隙中仍然是自由的水。)
soil moisture regime The water regime of the soil is determined by the physical properties and arrangement of the soil particles. The pores in a soil determine its water-retention characteristics. When all the pores are full of water, the soil is said to be saturated(土壤的水分状况是由物理特性和土壤颗粒的排列决定的。土壤的毛孔确定其保水特性。当所有的毛孔都装满水，土壤被认为是饱和的。)
