This book describes, collates and analyses the archaeological, zooarchaeological and palaeobotanical evidence for agriculture, livestock and cereal production in early medieval Ireland, AD 400-1100, particularly as revealed through archaeological excavations in Ireland since 1930. It is based on the research of the Heritage Council-funded Early Medieval Archaeology Project (EMAP), a collaborative research project between University College Dublin and Queens University Belfast, supported by the Irish government Department of Arts, Heritage and the Gaeltacht. Providing a range of insights into farmsteads and field enclosures, livestock management (particularly of cattle) and crop cultivation, along with a series of datasets presented in tables and gazetteer descriptions, it is arguably amongst the most detailed, focused and comprehensive analyses of early agricultural practice in its social and economic contexts in Europe, and the wider world.