Taking 25 surface soil samples of calcareous soil with greater difference in fertility on Loess Plateau as test materials,this paper studied the relationships of soil microbial biomass carbon(BC) and nitrogen(BN) with soil nitrogen mineralization potential(N0),total nitrogen(TN),organic carbon(OC),and particle composition.The results showed that BC and BN had significant positive correlations with TN and OC,suggesting that BC and BN were highly related with soil fertility and could be used as biological ind...
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