31 March 2017
Vol 355, Issue 6332

About The Cover

Cover image expansion

COVER Cross-sectional view of a sunflower root system. Globally, soils contain large amounts of organic carbon, more than half of which is stored at depths greater than 20 centimeters. By warming the entire soil profile, Hicks Pries et al. found that microbial decomposition of organic carbon at all soil depths is stimulated by warmer temperatures. See page 1420.
Photo: Jim Richardson/National Geographic Creative