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Soil erosion is a process threatening natural resources such as water, soil, plant cover and climate both directly and indirectly and it is dangerous for human safety and his life. Erosion not only weakens soil, makes useless farms and a lot of damage, but also causes harm by sedimentation solid of materials in streams, sources, dams, ports and decreases the amount of their capacity. In this project, we are studying soil erosion in Mousa Abad basin in Tiran, Isfahan in SLEMSA model using GIS. In this research, the...

Collapsible lands are generally found in arid and sub arid areas. These kinds of soils that are in metastable structure have high void ratio and low weight per unit volume. Loess soil that are wind deposits, residual soils, soils that are formed by volcanic ashes, alluvium soils, fine sand and silts, silt sand and loam are among the soils that have collapsing tendency. Collapsing that happened due to the increase on the water content of the base soil is generally seen in loosen silt layers that have low water cont...

Boron is a micronutrient required for all plant nutrition. The main functions of boron relate to cell wall strength and development division, fruit and seed development, glucose transport and hormone. Boron (B) is required for all plant growth. Adequate B nutrition is critical for high yields and qulity of crops. Deficiencies of B result in many anatomical, biochemical, physiological changes in plants. The B requirement is much higher for reproductive growth than for vegetative growth in most plant species. Boron ...

Main aim of this study is characterization of environmental contamination in surrounding of abandoned Sb-deposits in Slovakia by toxic elements as result of longtime mining activity. Main scientific interest is focused on migration of toxic elements in soil profile, their sources and bindings on Fe-oxyhydroxides or other natural sorbents, possibility of input to aquatic systems in studied localities. Results of chemical analyses of soil samples showed large-scale contamination of soil profiles in studied localitie...