@ARTICLE {BALASUBRAMANIAN:1991, title = {Effect of tree legumes in hedgerows on soil fertility changes and crop performance in the semi-arid highlands of Rwanda}, author = {Balasubramanian, V. and Sekayange, L. }, journal = {Biological Agriculture and Horticulture}, year = {1991}, volume = {8}, number = {1}, pages = {17--32}, issn = {0144-8765}, }