@ARTICLE {HAUSER:1998c, title = {Spatial and temporal gradients of earthworm casting activity in alley cropping systems}, author = {Hauser, S. and Asawalam, D. and Vanlauwe, B. }, journal = {Agroforestry Systems}, year = {1998}, volume = {41}, number = {2}, pages = {127--137}, issn = {0167-4366}, }