Reconstruction of soil pH by dendrochemistry of Masson pine at two forested sites in the Pearl River Delta, South China Yuan Wen Kuang, Da Zhi Wen, Guo Yi Zhou, Guo Wei Chu, Fang Fang Sun and Jiong LiAnn. For. Sci., 65 8 (2008) 804DOI: https://doi.org/10.1051/forest:2008070