A survey of 45 sustainable agriculture projects/initiatives spread across 17 African countries covering some 730,000 households, revealed that agroecological approaches substantially improved food production and household food security. In 95% of the projects, cereal yields improved by 50 to 100%. Total farm food production increased in all projects. The additional positive impacts on natural, social and human capital are also helping to build the assets base to sustain these improvements in the future
Source: Pretty, J 2004. Can sustainable agriculture feed Africa? New evidence on progress, processes and impacts. Environment, Development and Sustainability 1: 253-274, quoted in Food First response to Gates/Rockefeller.