| A review of whole farm systems models of greenhouse gas emissions from beef and dairy cattle production systems P Crosson, L Shalloo, D O’brien, GJ Lanigan, PA Foley, TM Boland, ... Animal Feed Science and Technology 166, 29-45, 2011 | 428 | 2011 |
| A life cycle assessment of seasonal grass-based and confinement dairy farms D O’Brien, L Shalloo, J Patton, F Buckley, C Grainger, M Wallace Agricultural Systems 107, 33-46, 2012 | 255 | 2012 |
| A case study of the carbon footprint of milk from high-performing confinement and grass-based dairy farms D O’Brien, JL Capper, PC Garnsworthy, C Grainger, L Shalloo Journal of Dairy Science 97 (3), 1835-1851, 2014 | 177 | 2014 |
| Relating the carbon footprint of milk from Irish dairy farms to economic performance D O’Brien, T Hennessy, B Moran, L Shalloo Journal of dairy science 98 (10), 7394-7407, 2015 | 105 | 2015 |
| The influence of strain of Holstein-Friesian cow and feeding system on greenhouse gas emissions from pastoral dairy farms D O’Brien, L Shalloo, C Grainger, F Buckley, B Horan, M Wallace Journal of dairy science 93 (7), 3390-3402, 2010 | 100 | 2010 |
| An appraisal of carbon footprint of milk from commercial grass-based dairy farms in Ireland according to a certified life cycle assessment methodology D O’Brien, P Brennan, J Humphreys, E Ruane, L Shalloo The International Journal of Life Cycle Assessment 19 (8), 1469-1481, 2014 | 90 | 2014 |
| An analysis of abatement potential of Greenhouse Gas emissions in Irish agriculture 2021-2030 G Lanigan, T Donnellan, K Hanrahan, P Carsten, L Shalloo, D Krol, ... Teagasc, 2018 | 81 | 2018 |
| A national methodology to quantify the diet of grazing dairy cows D O'Brien, B Moran, L Shalloo Journal of dairy science 101 (9), 8595-8604, 2018 | 74 | 2018 |
| Evaluation of the effect of accounting method, IPCC v. LCA, on grass-based and confinement dairy systems’ greenhouse gas emissions D O'Brien, L Shalloo, J Patton, F Buckley, C Grainger, M Wallace Animal 6 (9), 1512-1527, 2012 | 74 | 2012 |
| An evaluation of the effect of greenhouse gas accounting methods on a marginal abatement cost curve for Irish agricultural greenhouse gas emissions D O’Brien, L Shalloo, P Crosson, T Donnellan, N Farrelly, J Finnan, ... Environmental Science & Policy 39, 107-118, 2014 | 68 | 2014 |
| A life cycle assessment of the effect of intensification on the environmental impacts and resource use of grass-based sheep farming D O'Brien, A Bohan, N McHugh, L Shalloo Agricultural Systems 148, 95-104, 2016 | 60 | 2016 |
| The effect of methodology on estimates of greenhouse gas emissions from grass-based dairy systems D O’Brien, L Shalloo, F Buckley, B Horan, C Grainger, M Wallace Agriculture, ecosystems & environment 141 (1-2), 39-48, 2011 | 57 | 2011 |
| A dominance analysis of greenhouse gas emissions, beef output and land use of German dairy farms M Zehetmeier, H Hoffmann, J Sauer, G Hofmann, G Dorfner, D O’Brien Agricultural Systems 129, 55-67, 2014 | 55 | 2014 |
| Evaluation of allocation methods for calculation of carbon footprint of grass-based dairy production P Rice, D O'Brien, L Shalloo, NM Holden Journal of environmental management 202, 311-319, 2017 | 54 | 2017 |
| The Carbon Navigator: a decision support tool to reduce greenhouse gas emissions from livestock production systems P Murphy, P Crosson, D O'Brien, RPO Schulte animal 7 (s2), 427-436, 2013 | 34 | 2013 |
| How can grass-based dairy farmers reduce the carbon footprint of milk? D O’Brien, A Geoghegan, K McNamara, L Shalloo Animal Production Science 56 (3), 495-500, 2016 | 30 | 2016 |
| Life cycle assessment of pasture-based suckler steer weanling-to-beef production systems: Effect of breed and slaughter age J Herron, TP Curran, AP Moloney, M McGee, EG O'Riordan, D O'Brien Animal 15 (7), 100247, 2021 | 28 | 2021 |
| LIFE BEEF CARBON: a common framework for quantifying grass and corn based beef farms’ carbon footprints D O’Brien, J Herron, J Andurand, S Caré, P Martinez, L Migliorati, M Moro, ... animal 14 (4), 834-845, 2020 | 23 | 2020 |
| Greenhouse gas emissions and nitrogen efficiency of dairy cows of divergent economic breeding index under seasonal pasture-based management B Lahart, L Shalloo, J Herron, D O'Brien, R Fitzgerald, TM Boland, ... Journal of Dairy Science, 2021 | 22 | 2021 |
| The simulated environmental impact of incorporating white clover into pasture-based dairy production systems J Herron, D Hennessy, T Curran, A Moloney, D O'Brien Journal of Dairy Science, 2021 | 19 | 2021 |
