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《Southwest China Journal of Agricultural Sciences》 2002-02
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Spatial distribution characteristics in the plowed layer of yellow earth

ZHANG Shi rong,GONG Guo shu,DENG Liang ji,LIAO Ding xuan,CHEN He ping (Agricultural College,Sichuan Agricultural University,Ya′an 625014,China)  
The spatial distribution characteristics of gravimetric water,bulk density,clay content,pH,available phosphorus and available potash were studied by spatial autocorrelation,semivariance and fractional Brownian motion in the the plowed layer of yellow earth in Ya′an,Sichuan The results showed that the autocorrelation and variabilities of the properties were significant Their autocorrelation scopes were almost the same as to the ranges of semivariances from 30?m to 50?m The No scale intervals of fractional Brownian motion of the properties were in the middle of the autocorrelation scopes or the ranges of semivariances The fractal dimensions of the soil properties were situated between 2 3895 and 2 8853 The spatial variance of pH was the lowest,and that of available potash the highest The spatial variances of the other properties were situated between them
【CateGory Index】: S152.3
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