Corresponding author. Fax: + 32(16)293307. E-mail: Jean.Poesen@geo.kuleuven.ac.be
’ Soil Fertility Conservation Project (SFCJ, a co-operative project between Department of Soils and
Fertilizer:;, Mae Jo University (MJU), Chiaug Mai, Thailand, and Laboratory for Soil Fertility and Soil
Biology, Catholic University Leuven (K.U. Leuven), Leuven, Belgium.