Journal Article 2 Research Support, Non-U.S. Gov't 2 collaboration gradient 2 conservation gradient N762921K75 1 Nitrogen 1 Research Support, U.S. Gov't, Non-P.H.S. 1 mehr ... Review 1 Soil 1 economic gradient 1 functional plant strategies 1 plant size 1 root economics 1 root exudate 1 root functional trait 1 trade-off 1 trade-offs 1 trait economics 1 weniger ...