نتایج جستجو برای: soil cation exchange capacity
تعداد نتایج: 677170 فیلتر نتایج به سال:
چکیده ندارد.
In this research fly ash (FA) from Iran Ferrosilice Company was converted to zeolite A by hydrothermal procedure. The type and quality of produced zeolite depends on the composition of used FA, concentration of sodium hydroxide solution, and parameters such as temperature, reaction time and liquid/solid ratio. The fly ash was fused with sodium hydroxide at 550°C for 1 hour followed by dissoluti...
Abstract Soil cation exchange capacity (CEC) strongly influences the chemical, physical, and biological properties of soil. As direct measurement CEC is difficult, costly, time-consuming, indirect estimation from chemical physical parameters has been considered as an alternative method by researchers. Accordingly, in this study, a new hybrid model using support vector machine (SVM), coupling wi...
Cation exchange capacity (CEC) is a soil property that significantly determines nutrient availability and effectiveness of fertilizer applied in lands under different managements. CEC’s accurate high-resolution spatial information needed for the sustainability agricultural management on farms Nagaland state (northeast India) which are fragmented intertwined with forest ecosystem. The current st...
introduction: soil erosion by water is one of the most important processes of land degradation, especially in semi-arid areas. among different types of the soil erosion, gully erosion accounts as one of the most critical processes which can cause soil destruction, changes in landscape and water resources filling of reservoir of dams,decrease in water transport capacity of rivers and agricultura...
The urease enzyme plays an important role in the efficient use of urea fertilizer and some environmental risk assessment. Urease activities in 20 different soil samples of arid to semi-arid regions of Isfahan Province were determined and their correlations with some soil physical, chemical and biological characteristics were studied. Urease activities range from 5.3 to 79.2 µg NH4+ g-1 soil 2hr...
Studies on the soils of western Golestan province show that regardless of increased rain and presence of clay minerals with high cation exchange capacity, potassium extractable with ammonium acetate is low. In order to find the reason for this low amount of available K, clay minerals and micromorphology of the soil porosity were studied. Twenty disturbed and undisturbed samples from each horizo...
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