ارزيابي كيفي تناسب اراضي براي كشت سويا و آفتابگردان در منطقه دماوند به روش كشت فارياب

Qualitative Land Suitability Evaluation For Sunflower- Soybean in Damavand Area

Qualitative Land Suitability evaluation for Sunflower and Soybean was carried out on 20.000 hec Lands of Damavand region. The stages to this research are: Soil Survey,Soil sampling, Laboratory analysis of soil samples, Collection of Climatic farming System for Selected Crops, Soil Suitability mapping in GIS system, and evaluation of qualitative Land Suitability for Land Utilization types in the study Area,The Soils of the region were classified according to Soil Taxonomy (USDA1999).The Soils mainly separated into two orders : Entisols and Inceptisols. Qualitative evaluation was carried out according to both simple limitation and parametric approaches by comparing climate, topography and soil characteristic to crop requirements. Qualitative evaluation of Lands dataʹs from detailed soil Survey studies and Climatological figures and Topography Characteristics were used as the physical parameters, and simple limitation with Compared requirements of using the standard and rating tables of sys and parametric methods proposed by FAO in 1976. Results of qualitative land evaluation indicated that the climatic characteristics causes limitation of %37.52 and %43.77 respecting for Sunflower- Soybean growth and production in the research area some soil characteristics and topography are limiting factors too. For All production, the main limiting factors include percentage of calsium. For sunflower: the limiting factors include Coarse fragment and Relief and PH. For soybean: the limiting factors include Coarse fragment and Relief.