سهیلا سادات هاشمی

Using of the soil as a future trustee and one of the main factors in agricaltural production, should be based on accurate scientific principles for utilization in crops production as a sustainable source to provide human needs. One of the methods to achieve this important goal is land suitability evaluation for comman crops. In the region’s soils, that after sampling physical and chemical tests were performed and the profiles based on keys to soil taxonomy 2010 , were classified in Entisol and Inceptisol orders. The stadied area in the Gyantown, is located in the south of Nahavand country term of physigraphy unit groupsed piedmont plain elluvial fan. After collecting the information climate, soils and land scape land suitability evaluation for Canola and Sugerbeet products carried out with quality land suitability methods and MicroLEISsystem in FAO system. Initially qualitative suitability evaluation was carried out by methods of: simple limitation, limitation regarding number and intensity and parametric (storie and square root) in FAO system, which the square root parametric method results was more accurate and close to actual observantions, that confirm pervious researches. Also, qualitative land suitability evaluation was done by using of MicroLEIS system assessment, Almagra model based on soil properties and finally, the results investigation illustrates that land suitability evaluation parametrically( sqare root ) closely with the actual production. and also considering the charactristics of the climate, for sugarebeet 96/5 and canola is 90/5. That the climate problem is the culture of both the class S1 . The main limiting factors, water shortage in the region, the granol (grit) and acidity . The results showed that the studied area are better suited for the cultivation of sugarbeet to canola .