Differences in pedotransfer functions of bulk density lead to high uncertainty in soil organic carbon estimation at regional scales: Evidence from Chinese terrestrial ecosystems

Li Xu1, Guirui Yu2, Nianpeng He3, Ding Wen3, Honglin He1 and Yang Gao3, (1)Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China, (2)Key Laboratory of Ecosystem Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China, (3)IGSNRR Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, China