Elevated atmospheric CO2 increases microbial growth rates in soil: results of three CO2 enrichment experiments

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Soil C and N availability determine the priming effect: microbial N mining and stoichiometric decomposition theories (2014, unknown): “This indicated that K-strategists are more competitive in decomposing substrates with low N availability (Blagodatskaya et al., 2010).”
Enhanced root exudation induces microbial feedbacks to N cycling in a pine forest under long-term CO2 fumigation. (2011, methodology): “Yeast extract was chosen as a substrate to stimulate microbes with diverse nutrient requirements (Bradford et al. 2008; Blagodatskaya et al. 2010).”
Root exudates increase N availability by stimulating microbial turnover of fast-cycling N pools (2017, unknown): “Previous studies that have used yeast extract (Fierer et al., 2003) or compared glucose and yeast addition (Blagodatskaya et al., 2009) suggest that yeast is often a better substrate for maximizing growth rate (relative to glucose) given that the extract provides a richer medium for microbes and…”