Axial root anatomy Journal Article 1 N762921K75 1 Nitrogen 1 Research Support, Non-U.S. Gov't 1 Research Support, U.S. Gov't, Non-P.H.S. 1 genotypic variation 1 mehr ... maize (Zea mays L.) 1 nitrogen use efficiency 1 node 1 phenotyping 1 plasticity 1 weniger ...