Journal Article 4 nitrogen concentration N762921K75 3 Nitrogen 3 Research Support, Non-U.S. Gov't 2 Bylot Island 1 C3 species 1 mehr ... C4 grasses 1 CO2 concentration 1 Chen caerulescens atlantica 1 Encelia farinosa 1 Mojave Desert 1 Nitrogen Isotopes 1 Research Support, U.S. Gov't, Non-P.H.S. 1 Soil 1 age 1 anatomical traits 1 biomass production 1 climate 1 climate change 1 desert shrub 1 ephemeral root module 1 fine roots 1 functional groups 1 grassland 1 intra-plant fractionation 1 life span 1 modified rhizotron 1 nitrogen isotope ratio 1 nitrogen use efficiency 1 weniger ...