Land suitability evaluation in Oshnavieh plain (West Azarbaijan)
2010
Ghaemian, Nader | Seyed Jalali, Seyed Alireza | Ammary, Parviz | Tahmasebi, Korosh | Nemati, Tahere | Fard Sadegh, Parivash
Land suitability evaluation has been determined for irrigated wheat,barley.sugar beet and alfalfa in an area about 21170 ha in Oshnavieh plain in West Azarbaijan Province. In order to have more confident soil data, soil survey studies were done.Soils were classified based on F.A.O soil classification and 17 families and 26 phases were identified . Climatic data from Poldasht station have been used for climate evaluation of crops . Based on yield coverage and climatic conditions, wheat sugar beet,barley and alfalfa have been considered and compared in the present land suitability evaluation on the basis of irrigated agricltural system. In this region, the most important limiting land haracteristics have appeared to be ,land phisical properties limitation ,topography and soil pH. In surveyed area the climatic classes are suitable(S1) for wheat,alfalfa and sugarbeet and moderately suitable(S2) for barley ,Analysis of rainfall and ETO data reveals that the growing period is about 63 days, starting on December18 until April 13. the parametric methode (ie. square root methode) for determination of land indexes for 4 crops, in this methode the land indexes for sugar beet was always higher than those for wheat and alfalfa, the square root method was considered to be more realistic for land suitability evaluation in the studied areas .
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