@INBOOK {VAN DER KRUIJS:1989, title = {Observations on decomposition rates of leaves of several shrub and tree species applied as mulch under humid tropical conditions}, author = {Van der Kruijs, A. C. M. B. and van der Heide, J. and Kang, B. }, year = {1989}, type = {Nutrient management for food crop production in tropical farming systems, edited by van der Heide}, pages = {361--366}, publisher = {Institute of Soil Fertility (IB)}, address = {Haren, Netherlands}, }