The Dynamics of Soil Water. Part II. Temperature and Solute Effects

摘要: Changes in the soil temperature and solute concentration occur continually under natural field conditions. Examples of variations are given chapter 14, particularly Fig. 14-13 14-14. In addition to this type of change induced by moisture flow, soil's solution oscillates between saturation under dry conditions very dilute values after a rain or irrigation. Soil temperature, like concentration, changes. Its variation is conveniently classified as diurnal (Fig. 13II-1) seasonal (Fig. 13II-2). The thermal changes are generally significant depth 20 or 30 cm; zone which contains greatest proportion plant roots. The seasonal wave extends well below most crop