GIS-based soil fertility evaluation——a case study in Changchun suburb area
HU Yue-Ming1, ZHANG Jia-En2, WUGu-Feng3, LI Zhuo-Yi1, YAO Wei-Min2, XU Jian-Bo1
1. GIS Lab, South China Agricultural University, Guangzhou 510642, China; 2. Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou, 510642, China; 3. Deparment of Mathematics, Foshan Education College, Foshan 528000, China
Based on the techniques of Geographic Information System(GIS), soil fertility evaluation was conducted for the farmlands in Changchun suburb area. Arclnfo software was adopted for spatial data collection, processing and analysis. Evaluation unit was determined by land use. AHP was applied to judge the weight of each evaluation factor. Based on the method of fuzzy mathematics, membership functions were set up to calculate the values of all evaluation factors and units. Soil fertility level was graded according to the comprehensive assessment values. The evaluation result was mapped using Arc View GIS software.
