Azam Beigi; Naser Mashahadi; Majid Karimpourreihan
Abstract
Mining activities are one of the most persistent causes of soil degradation due to the destabilization of the physicochemical structure of the soil. In this research, quantitative data of soil stability indicators were used to assess the effect of sodium sulfate extraction on soil properties and protective ...
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Mining activities are one of the most persistent causes of soil degradation due to the destabilization of the physicochemical structure of the soil. In this research, quantitative data of soil stability indicators were used to assess the effect of sodium sulfate extraction on soil properties and protective behavior of the earth's surface. The research method was based on tranformations in soil stability indicators, namely, acidity (pH), electrical conductivity (EC), exchangeable sodium percentage (ESP) and sodium absorption ratio (SAR), for natural surfaces (undisturbed topsoil), stripped topsoil layer (displaced soil layer) and sodium sulfate extraction layer. The results show that the concentration of exchangeable sodium percentage and the exchangeable calcium to magnesium ratio in the layer of displaced soil and the extraction layer of sulfate is reduced compared to the natural soil. While the organic matter content of soils does not change in all layers, and the value of electrical conductivity in the sulfate extraction layer is higher than all layers. The results of the soil stability data value show the instability of the displaced soil layer compared to the other two layers. Based on the presented results, it has been shown that the soil instability potential increases due to sodium sulfate extraction.
Raziyeh Dehghani; Mohammad Jafari; Mohammad Ali Zare Chahouki; Salman Zare; ِAli Tavili; Babak Moteshrezadeh
Abstract
The use of biochar as a soil amendment is one of the new methods to improve soil properties and increase plant yield. In this study, in order to evaluate the effect of adding natural biochar on soil properties and yield of Pamirian winterfat (Eurotia ceratoides) plant, an experiment in a completely randomized ...
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The use of biochar as a soil amendment is one of the new methods to improve soil properties and increase plant yield. In this study, in order to evaluate the effect of adding natural biochar on soil properties and yield of Pamirian winterfat (Eurotia ceratoides) plant, an experiment in a completely randomized design were performed with 11 treatments by different levels of biochar (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10% by weight) and three replications in greenhouse conditions. After the end of the growing season, some physical and chemical properties of the soil (pH, EC, organic matter (%), lime, bulk deisty, particle density, and porosity percentage), germination percentage, and yield of E. ceratoides were measured. In all the studied traits of the soil (except for the particle density), and the characteristics of the E. ceratoides plant, the statistical difference between the various levels of biochar was significant (a = 0.01). Adding different levels of biochar increased pH, ECy, soil porosity percentage, soil organic matter, whereas decrased bulk density, lime percentage, clay percentage, sand, and silt.
