Journal Article 4 plant nitrogen uptake Soil 3 N762921K75 2 Nitrogen 2 059QF0KO0R 1 15N tracing studies 1 mehr ... Meta-Analysis 1 Research Support, Non-U.S. Gov't 1 Research Support, U.S. Gov't, Non-P.H.S. 1 Water 1 amino acids 1 arbuscular mycorrhizal fungi 1 drought 1 ecosystem nitrogen cycling 1 ecosystem nitrogen retention 1 ectomycorrhizal fungi 1 forbs 1 grasses 1 grasslands 1 mineral‐associated organic matter 1 nitrogen immobilization 1 nitrogen limitation 1 nitrogen mineralization 1 particulate organic matter 1 plant–microbial interaction 1 plasticity 1 root elongation rate 1 root traits 1 soil conditions 1 weniger ...