Effects of Agricultural Activities on Land Degradation in the Khatam City

Need to Increasing agricultural land in order to improve food resources in the past two centuries recent lead to widespread changes in land use and improper management of these lands. Continue this process can lead to land degradation and desertification, and improve such soils is very costly; Therefore, prevention of land degradation is more desirable. This function requires to research on the utilization of land agricultural and how to use. With this aim, the Khatam city was selected as the study region and various maps of the region, including soil, land use and height maps was prepared to help ArcGIS9.3 and ENVI software. Four dominant land region mention mono cultivated and multi cultivated systems under irrigation, garden lands and range lands as control treatments were considered as the treatments. The soil was sampled and soil factors in two corrective factors, including correction factors N, P, K, CO, Caco3, Mg and damaging factors Hco3, Cl, Na, pH, EC and SAR at depth 0 to 30 cm of the soil surface horizons were studied. Factors the design of split plots showed that there are significant differences between treatments in the region and soil of region is relatively poor from CO, N, K and P in soils Rdhy. The comparison of treatment means with Duncan Mean Comparison indicated that the garden lands as the most suitable treatments and range lands as the most unsuitable one.