%0 Conference Paper %A Sivakumar, M V K %A Renard, C %A Klaij, M C %A Ntare, B R %A Fussel, L K %A Bationo, A %B Sustainable agriculture : issues, perspectives and prospects in semi arid tropics : proceedings of the international symposium on natural resources management for a sustainable agriculture %C New Delhi, India %D 1990 %F icrisat:4634 %P 129-162 %T Natural Resources Management For Sustainable Agriculture In The Sudano-Sahelian Zone %U http://oar.icrisat.org/4634/