@ARTICLE {VANLAUWE:2005, title = {Senna siamea trees recycle Ca from a Ca-rich subsoil and increase the topsoil pH in agroforestry systems in the West African derived savanna zone}, author = {Vanlauwe, B. and Aihou, K. * and Tossah, B. * and Diels, J. and Sanginga, N. and Merckx, R. }, journal = {Plant and Soil}, year = {2005}, volume = {269}, number = {1-2}, pages = {285--296}, issn = {0032-079X}, }