ÃÞ »¨ ѧ ±¨ Cotton Science 2010£¬22£¨4£©£º339-346
Classification of Management Zones for Soil Nutrients in Cotton Land Based on Fuzzy Clustering Analysis Abstract£ºThe objective of this research was to define management zones of oasis cotton field in Xinjiang Province . The variables of organic matter, available N, available P and available K data determined in 100 top soil (0-30cm) samples were selected as data sources. The results indicated that the whole field was divided into four optimum management zones, the average confusion index was 0.23 in all management zones and the spatial distribution of membership grades was unambiguous. It showed that variation coefficient of soil nutrients decreased in every management zone than total field and differed significantly. It is recommended that the method of spatial prediction based on the fuzzy set theory could achieve a zoning result, it can be used for fertilizer recommendation and scientific direction to manage soil nutrient.
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