عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In the present study, the effect of application of a zeolite (Mianeh clinoptilolite), was investigated on the moisture contents and soil characteristic curves of a sandy and a clay loam soil. Mianeh clinoptilolite zeolite was applied to soils at four levels (0, 2, 5, and 8% on weight basis) in a completely randomized experiment. Soil’s moisture content was determined at suctions of 0, 5, 7.5, 10, 33, 100, 500, and 1500? kPa using hanging water columns and pressure plate apparatus. Water retention curve models of van Genuchten (1980), Brooks-Corey (1964), and Campbell (1974) were fitted to each soil data using SWRC 3.0 software. Mianeh zeolite enhanced soil moisture content at each measured soil suction. The Mianeh zeolite increased the saturation and available water content of the sandy soil and saturation water content (qs) and residual water content (qr) in both soils. In addition, this zeolite modified the shape of moisture characteristic curves of both soils and influenced the parameters of all three water retention models in a manner exhibiting reduced water release rates. Mianeh zeolite can be useful in enhancing water use efficiency.