جستجوی مقالات مرتبط با کلیدواژه « کلاس های تناسب اراضی » در نشریات گروه « آب و خاک »

The soil units in the irrigated plains across the country were identified based on previous soil studies, satellite images, land use maps, and agricultural-climatic zones. The purpose was to determine the land potential for irrigated cultivation of industrial crops such as sugar beet, cotton, safflower, and sugarcane. Then, the FAO framework and the square root parametric method were used to evaluate the land suitability for irrigated cultivation of these crops. The survey results revealed the land suitability classes for four crops under irrigated cultivation: sugar beet, cotton, safflower, and sugarcane. For sugar beet, out of 4 million hectares (Mha) of surveyed land, 1.23 Mha were in class S1 (highly suitable), 1.5 Mha in S2 (moderately suitable), 740 thousand hectares (Tha) in S3 (marginally suitable), 390 Tha in N1 (currently suitable), and 420 Tha in class N2 (permanently suitable). For cotton, out of 2.4 Mha of surveyed land, 75 Tha were in class S1, 671 Tha in S2, 895 Tha in S3, 420 Tha in N1, and 340 Tha in N2. For safflower, out of 2.2 Mha of surveyed land, 38 Tha were in class S1, 56 Tha in S2, 1.3 Mha in S3, 363 Tha in N1, and 398 Tha in N2. For sugarcane, out of 615 Tha of surveyed land, 6 Tha were in class S1, 18 Tha in class S2, 193 Tha in class S3, 98 Tha in class N1, and 300 Tha in class N2. The data was statisticaly analysed and the results indicated that the the land suitability classes were classified with resonable accuracy. The following factors were the main limiting characteristics that limited cultivation of the four crops under irrigation: For sugar beet: soil pH, salinity, alkalinity, and drainage; for cotton: climate, slope, salinity, alkalinity, lime and gypsum; for safflower: pH, drainage, salinity, alkalinity and climate; and for sugarcane: salinity, alkalinity, drainage and slope. Due attention to the prepared land suitability maps of the aforementioned crops would facilitate cultivation management for farmers and planners.