Suitability Evaluation on Brassica campestris in Zunyi County,Guizhou Province
GIS technology was used to analyze different soil nutrients in the research areas,and to confirm the evaluating units and select different suitability evaluation factors.Suitability evaluation index system was also been determined.The AHP was used to calculate the weight factor and comprehensively evaluate the suitability of B.ampestris in Zunyi County.The results showed that the majority land of Zunyi is suitable for B.campestris cultivation.The paddy soil suitable for B.campestris planting is 39 399.07 hm2,accounting for 46.91% of the total,and highly suitable for planting is 17 143.78 hm2,accounting for 20.41% of the total.