About the Authors

Hong Xu

Current address: Thomson Reuters, Chicago, Illinois, United States of America

Affiliation Department of Soil, Water and Climate, University of Minnesota, Saint Paul, Minnesota, United States of America

Tracy E. Twine

twine@umn.edu

Affiliation Department of Soil, Water and Climate, University of Minnesota, Saint Paul, Minnesota, United States of America

Evan Girvetz

Affiliation International Center for Tropical Agriculture, Nairobi, Kenya

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HX TT EG. Performed the experiments: HX EG. Analyzed the data: HX TT. Contributed reagents/materials/analysis tools: HX EG. Wrote the paper: HX TT.