| http://www.w3.org/ns/prov#value | - Many studies have found this ratio to be a strong predictor of N loss (Gunderson et al. 1998, Dise et al. 1998, Lovett et al. 2002, Ross et al. 2004).One possible mechanism for N retention following earthworm invasion is an increase in total microbial biomass, which may act as a strong immobilization sink for available N in C-rich soils (Groffman et al. 2004).
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