عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The total specific surface area is a factor that can relate micro-scale properties to macro-scale physical and chemical properties of a porous medium. Soil moisture characteristic curve (SMCC) is a fundamental and hydraulic feature of the soil; it is a very important quantitative expression in modeling water flow, water uptake by plants root, and transported salt at run off in the unsaturated soils. In this study, the effects of soil specific surface area (SSSA) on soil characteristic curve was evaluated in 30 soil samples. The SSSA was measured by using the BET method and also pressure plate apparatus was used to measure the soil moisture characteristic curve. Analysis of data showed positive significant correlation between SSSA with measured soil moisture values corresponding to pressures exerted by pressure plates.