You are herenitrogen use efficiency
nitrogen use efficiency
Enzyme activity and microbial community structure in the rhizosphere of two maize lines differing in N use efficiency
Link http://download-v2.springer.com.proxy.lib.iastate.edu/static/pdf/625/art...
Pathan et al. Plant Soil (2015) 387:413–424
Abstract
Microbial nitrogen use efficiency - Nature Communications
http://onlinelibrary.wiley.com/store/10.1002/2013GB004595/asset/gbc20136...
Adjustment of microbial nitrogen use efficiency to carbon:nitrogen imbalances regulates soil nitrogen cycling, Mooshammer et al. 2014. Nature Communications