Zoning the Climatic Potentials of Dry-Farming Wheat Cultivation in the West Azarbaijan (Iran)

Recognition of climate and research about climatic requirements of farm plants can be regarded as main factors in the production process. By carrying out research in agro climatology one can assign climatic potential capabilities in various regions and use their optimum models. This comprehensive research was carried out on the basis of long-term data of climatology factors. For this purpose we have used GIS softwares. The parameters are being used in this study: probability of 300mm annual precipitation occurrence and more, autumn and spring rainfall with 75% occurrence probability, occurrence probability of appropriate temperature (8-14 T0c) for germination period of wheat, occurrence probability of daily maximum temperature of 25 and more in flowering stage and occurrence probability of 30 T0c in nourishing stages.We used the precipitation data of 26 stations and the temperature data of 13 stations for doing research. In order to access different flourishing stages of wheat growth, we used Growth Days - Degree (GD-D) method being designed in FORTRAN.Using wheat growing requirements (including desired climatic conditions) the information layers were classified and the weight value of each polygon assigned. Finally by overlaying the information layers, Makhdoom's “classified weighted model” the final map for the West Azarbaijan dry-farming wheat production was designed.The last results of this study show the fact that the importance of each of temperature and precipitation factors differ according to different flourishing stages in different regions of the province. The possibility of recognizing the utility rates of wheat production would be provided through overlaying various effective layers of this yield in GIS environment.