TY - BK AU - El-Ashry,M.T. TI - Ecological sustainability and food security: Challenges and opportunities PY - 2002/// CY - Washington, DC (USA) PB - CGIAR, KW - Biodiversity KW - AGROVOC KW - Crop husbandry KW - Ecosystems KW - Environmental factors KW - Industrial development KW - Maize KW - Production economics KW - Project management KW - Protein quality KW - Rice KW - Food security KW - Farming systems ER -