Are soils of Iowa USA currently a carbon sink or source? Simulated changes in SOC stock from 1972 to 2007

Autor: Liu, Shuguang a, Tan, Zhengxi b, ⁎, Li, Zhengpeng b, Zhao, Shuqing c, Yuan, Wenping d
Zdroj: In Agriculture, Ecosystems and Environment 30 January 2011 140(1-2):106-112
Databáze: ScienceDirect