00757nam a2200181Ia 4500 CTU_58500 210402s9999 xx 000 0 und d 630.257775 B573 F. Waliyar Beyond the gene horizon: Sustaining agricultural productivity and enhancing livehoods through optimization of crop and crop-associated biodiversity with emphasis on semi-arid tropical agroecosystems: Proceedíng of a workshop 23 - 25 September 2002, Patancheru, India Edited by F. Waliyar, L. Collette and P. E. Kenmore Rome, Italy FAO 2003 agricultural ecology,crops and climate Minh Trung tâm Học liệu Trường Đại học Cần Thơ