s:894:"%T Agroforestry with N2-fixing trees: sustainable development's friend or foe? 
%A Rosenstock, T.S. 
%A Tully, K.L. 
%A Arias-Navarro, C. 
%A Neufeldt, H. 
%A Butterbach-Bahl, K. 
%A Verchot, L.V. 
%X Legume tree-based farming systems sit at a crucial nexus of agroecological sustainability. Their capacity to support microbial N2 fixation can increase soil nitrogen (N) availability and therefore improve soil fertility, crop yields, and support long-term stewardship of natural resources. However, increasing N availability oftentimes catalyzes the release of N into the surrounding environment, in particular nitrous oxide (N2O)-a potent greenhouse gas. We summarize current knowledge on the agroecological footprint of legume-based agroforestry and provide a first appraisal of whether the technology represents a pathway toward sustainable development or an environmental hazard. 
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