Impacts of diverse undersown cover crops on seasonal soil microbial properties.

The increase of microbial biomass with increasing CCR did not translate into higher microbial respiration, as indicated by a decreasing trend on the microbial metabolic quotient, potentially due to the supply of diverse resources and modification of microenvironment (Bardgett et al. 1999 , Eisenhauer et al. 2013 ).

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The microbial metabolic quotient showed a marginally significant decrease in vegetated plots than in bare fallow (–28.7%, Fig. 2e ), no response to undersown CCs compared to barley monoculture (Fig. 2f ) and decreased marginally with increasing CCR ( P = .05, Fig. 2g ).

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