The Institute of Development Studies has led consortia of UK and African organisations in two large programmes of agricultural policy research: the original Future Agricultures Consortium programme, running from 2005 to 2014, and the successive Agricultural Policy Research in Africa programme, from 2016 to 2022. These programmes involved African field research teams, linked to African Universities, and conducting policy-relevant research into key issues relative to the future of agriculture in Africa and inclusive agricultural commercialisation (APRA). A component of both programmes was to use the evidence collected to influence the policy environment in favour of productive, sustainable, and inclusive agriculture. This paper explores what has been learnt in these two programmes about using field research evidence to improve agricultural policy.