Farming systems and food security in Africa: priorities for science and policy under global change

agricultural extension agricultural population agricultural productivity agropastoral systems cereal crops climate change diversification drylands ecosystem services energy farm size farmers farming systems fertilizers fish culture food security forests gender highlands households human capital hunger intensification investment irrigated farming land tenure livestock living standards maize market access mixed farming natural resources nutrition security perennials peri-urban agriculture policies poverty resilience root crops smallholders socioeconomic environment soil fertility strategies sustainable development technology trade tree crops tubers urban agriculture water management women yield gap