Bare-Soil Evaporation in Relation to Tillage

摘要: Direct evaporation from soil constitutes a major pathway of water loss, which is considered wasteful since it does not contribute to crop production. It estimated that 50 70% annual precipitation returned the atmosphere as direct without any benefit production (Hide, 1954; Peters and Russel, 1959; Harrold et al., Peters, 1960). In fact, even in growing crops (exposed) surface E s accounts for substantial part evapotranspiration (ET). Tanner aL (1960) widely spaced row such corn, if wetted frequently by rain or irrigation, may be high 50% ET, when canopy fully developed.