干旱区生态环境知识资源中心

The aims of this study are: (1) producing a geometrically corrected physiographic soil map scale 1:50,000 reduced to the attached map; (2) crop water requirements calculation for the suitable crops in this area. To fulfill the first aim, ten soil profiles were selected to represent the different mapping units. Morphological description was carried out and soil samples were collected for physical and chemical analysis. Based on the Enhanced Thematic Mapper Plus images and the geographic information system, coupled with the field work and laboratory analysis data, the physiographic soil map was produced. Satellite images interpretation indicated that the investigated area includes the main physiographic units are plateaus, hilland, mountain, and depression floor. With respect to the second aim, the main land qualities of the different mapping units and the crop requirement were rated and matched to obtain the current and potential land suitability using Automated Land Evaluation system. The most suitable crops for the studied area were: clover, wheat, beans, sugar beet, onions, maize, sunflower, tomato, potato, groundnut, pea, lentil, barley, sesame, and carrots. The crop water requirements for the selective crops were calculated using CROPWAT 8.0 for Windows program as: 781.80, 571.70, 383.20, 641.55, 395.45, 771.80, 693.90, 880.32, 432.00, 510.30, 205.05, 201.30, 284.20, 487.95, and 254.85 mm, respectively.