Problems caused by immethodical and unsuitable using of lands, irregular development of urban areas and therefore reduction in cultivation zones has received widespread attention throughout the world. Using of optimum, capability and suitable methods of land is the main concern of policy markers for the sustainable planning and management most of the cultivation areas. Hence, studies related to land capability evaluation will provide sustainable using agricultural lands. On the other hand the adequacy of soil fertility maps created for variable rate fertilization depends on the variability of the soil properties, sampling design and intensity, interpolation techniques, and mapping protocols. The objectives of this study are to evaluate qualitative land capability and create fertility map of macro nutrients of the Hoomand Absard region (Tehran province) of Iran. This study carried out in an area including 500 ha in the form of semi-detailed surveying level. The various procedures of this investigation are site setting, sampling and land capability evaluation. In studied area, soils were classified in inceptisols order. In the current study, the result of soil analysis of eight soil profiles in three different types of land uses (irrigation farming, dry farming and range) by land capability of different unit samples and field studies were obtained. Results showed that land capability classification different ranges of classes from very suitable (I) to generally unsuitable (VI) were discovered which are variable by particular soil properties such as topsoil, subsoil stoniness, and topography characteristic like slope. Considering the results of distribution map of the pH, EC, CCE, N, P and K, there are relatively good conditions in the studied region.
Abstract