@ARTICLE {VANLAUWE:2001b, title = {Alley cropping with Senna siamea in southwestern Nigeria: 11 Dry matter, total N, and urea-derived N dynamics of the Senna and maize roots}, author = {Vanlauwe, B. and Sanginga, N. and Merckx, R. }, journal = {Plant and Soil}, year = {2001}, month = {April}, volume = {231}, number = {2}, pages = {201--210}, issn = {0032-079X}, doi = {10.1023/a:1010396912235}, }