Seasonal ionic exchange in two-layer canopies and total deposition in a subtropical evergreen mixed forest in central-south China Gong Zhang, Guang Ming Zeng, Yi Min Jiang, Guo He Huang, Jia Mei Yao, Ren Jun Xiang and Xi Lin ZhangAnn. For. Sci., 63 8 (2006) 887-896DOI: https://doi.org/10.1051/forest:2006072