b'Session III: Options for management approaches inreducing contaminant loss riskRegional Constraints on Sustainable Livestock Production:Challenges and OpportunitiesDoody DG11Agri-food & Bioscience Institute, Northern IrelandIncreasing world population, changing consumption patterns and the agri-food industrysambition for expansion, will drive an increase in outputs from Irish agriculture into the future. With spatial expansion of agriculture in Ireland limited by the availability of suitable land,increases in agricultural outputs will be driven by intensification of farming in existing areas through improvements in technology and resource efficiency. This will have to be achieved within the context of the targets established by EU environmental directives, such as the Nitrates Directive (ND) (91/676/EEC) and Water Framework Directive (WFD) (2000/60/EC). In 2017 the national phosphorus (P) surplus of Northern Ireland agriculture was 12.3 kg P /Ha, with 23,717 tonnes of phosphorus being return to land in the form of livestock manures. With an estimated 47% of soil in Northern Ireland above the agronomic optimum Olsen soil P value, continued ap-plication of manures to many soils is unsustainable if the targets of the WFD are to be achieved. However, there are significant constraints on farmers in terms of manure management and its redistribution across the region. In this paper we present a regional analysis of the challenges and opportunities of manure management across NI and consider the mitigation strategies that will need to be employed where P surpluses are unsustainable.11'