evaluation of land suitability for rainfed barley and wheat in agrecological zones of abyek area

agro-ecological zoning is one of the effective tools for assining land to suitable land use.the study areawith16618ha islocatedin abyek area inqazvin province. in totally 43 agro- ecoloical zones were distinguished by combining maps of isohyet, isotherm, length of growing periodand agro-edaphic zones. based on above information a land suitability was produced for the study area and prediction of production potential was done for each zone. production potential ranged between 340 to 3000 kg/ha for rainfed wheat and between 455 to 4040 kg/ha for rainfed barley, whilethefarmers yieldis for lowerthanpredicted yields. soil properties and climate were considered the most limiting factors for crop production in the study area.