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Quantitative Assessment of Rape-planting-suitability of farmland in Guangde County Based on GIS

LU Zu-yao1,YANG Ping2,LI Xian-sheng2,NIE Wen-fang2 (1 Soil and Fertilizer Station of Guangde,Guangde,242200;2 Soil and Fertilizer Station of Xuancheng,Xuancheng,242000)  
Based on the historical data and the current data of farmland which obtained in 1985 from the 2nd National Soil Survey and in 2005 from the project of 'Soil Test and Formula Fertilization',the rape-planting-suitability of farmland in Guangde County was assessed quantitatively with ArcGIS and CLRMIS(Cultivated Land Resource Management Information System at County Scale).The results show that the areas of the most suitable,suitable,reluctant and not-suitable planting grade of farmland are 7240hm2,37450hm2,24950hm2 and 5360hm2,respectively;which constitute of 9.7%,49.9%,33.3% and 7.1% of the total area of the cultivated land,respectively.
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