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Present studies were conducted to determine the land suitability for field crops including wheat, barley, sorghum, grain maize, rice, lentil, tobacco, sunflower, canola, sesame, safflower, potato, tomato, onion, garlic, pepper, carrot, cabbage, watermelon, muskmelon, cucumber, alfalfa, clover, sorghum, and millet and apricot, and orchard crops including grape, pistachio, date, olive, citrus, coconut, banana, guava and lotus using parametric method for irrigated lands that had soil map in an area of 107 thousand hectares of Sistan and Baluchestan province.Results showed that garlic, clover, watermelon, muskmelon, sesame and guava had no climatic limitation in the studied areas. According to the results, barley and wheat had the most area of the highly suitable class (S1), and the moderately suitable class (S2) in the province. Canola and safflower had mostly the marginally suitable class (S3). Among patch fields, watermelon had the most area of suitable in the studies area. Sorghum, alfalfa and clover had the most areas of moderately suitable class (S2) in the province. Tobacco had the most area of the currently unsuitable class (N1) and in the permanently unsuitable class (N2) in the province. In the north part of province, grape and olive in some lands had S2 classes. In the south part of the province, guava lotus and citrus had the most area of suitable classes among orchard crops. The most limiting factors of growth for crops are soil salinity and alkalinity, fertility, physical properties and climate in Sistan and Baluchestan province. Proper management can decrease the limitations of soil salinity and fertility in this province. Many land areas in Sistan and Baluhestan province did not have soil maps; therefore for determining the land suitability for these areas, the soil maps should be prepared.Keywords: Sistan and Baluchestan province, Field and orchard crops, Land suitability classification, Parametric method.
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