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Physical land suitability evaluation for specific cereal crops using GIS at Mashhad Plain, Northeast of Iran |
Ali BAGHERZADEH1(), Mohammad Reza MANSOURI DANESHVAR2 |
1. Department of Agriculture, Mashhad Branch, Islamic Azad University, Mashhad, Iran; 2. Department of Geography, Mashhad Branch, Islamic Azad University, Mashhad, Iran |
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Abstract Land evaluation is the process of predicting land use potential on the basis of its attributes. In the present study, the physical land suitability evaluation approach was investigated for specific cereal crops including irrigated wheat, barley, grain maize and sorghum, based on FAO land evaluation frameworks (FAO, 1976, 1983, 1985) and the proposed method by Sys et al. (1991) at Mashhad Plain, Northeast Iran. Twenty eight soil profiles were studied on seven land units by a precise soil survey and their morphological and physicochemical properties were determined. Climatic and land qualities/characteristics of four cereal crops were determined using the tables of crop requirements developed by Sys et al. (1993). An interpolation function was used to map values to scores in terms of land qualities/characteristics for land utilization types and the evaluation was carried out according to parametric approaches. The interpolation technique using GIS functions helped in managing the spatial data and visualizing the results. Our results indicated that the most important limiting factors for irrigated wheat and barley cultivations are soil physical and fertility/chemical properties, while the production of irrigated grain maize and sorghum is mainly limited by climatic conditions at Mashhad Plain. It was shown that all land units suitable for irrigated wheat cultivation overlap with that of barley, whereas the same limiting factors resulted in the overlapping of the irrigated grain maize production area with that of sorghum. The results of the physical land suitability evaluation for specific cereal crops indicated the priority of irrigated barley and wheat cultivations over irrigated grain maize and sorghum at the study area.
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Keywords
land suitability evaluation
parametric methods
Storie and Square root methods
Kalogirou method
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Corresponding Author(s):
BAGHERZADEH Ali,Email:abagher_ch@yahoo.com
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Issue Date: 05 December 2011
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