| Seasonal changes of arbuscular mycorrhizal fungi as affected by tillage practices and fertilization: hyphal density and mycorrhizal root colonization Z Kabir, IP O'halloran, JW Fyles, C Hamel Plant and Soil 192 (2), 285-293, 1997 | 279 | 1997 |
| Total and organic phosphorus IP O'Halloran, BJ Cade-Menun Soil sampling and methods of analysis, 213-229, 1993 | 169 | 1993 |
| Total and Organic Phosphorus IP O'Halloran, BJ Cade-Menun Soil Sampling and Methods of Analysis, Second Edition, 2007 | 159* | 2007 |
| Vertical distribution of arbuscular mycorrhizal fungi under corn (Zea mays L.) in no-till and conventional tillage systems Z Kabir, IP O'halloran, P Widden, C Hamel Mycorrhiza 8, 53-55, 1998 | 139 | 1998 |
| Dynamics of the mycorrhizal symbiosis of corn (Zea mays L.): effects of host physiology, tillage practice and fertilization on spatial distribution of extra-radical mycorrhizal … Z Kabir, IP O'Halloran, JW Fyles, C Hamel Agriculture, ecosystems & environment 68 (1-2), 151-163, 1998 | 129 | 1998 |
| Soil Tests as Risk Indicators for Leaching of Dissolved Phosphorus from Agricultural Soils in Ontario YT Wang, TQ Zhang, IP O'Halloran, CS Tan, QC Hu, DK Reid Soil Science Society of America Journal 76 (1), 220-229, 2012 | 112 | 2012 |
| Sodium bicarbonate-extractable phosphorus JJ Schoenau, IP O’Halloran Soil sampling and methods of analysis, 89, 2007 | 105 | 2007 |
| Options for improved phosphorus cycling and use in agriculture at the field and regional scales KD Schneider, JR Thiessen Martens, F Zvomuya, DK Reid, TD Fraser, ... Journal of Environmental Quality 48 (5), 1247-1264, 2019 | 101 | 2019 |
| Absorption of P by corn (Zea mays L.) as influenced by soil disturbance IP O'HALLORAN, MH Miller, G Arnold Canadian journal of soil science 66 (2), 287-302, 1986 | 98 | 1986 |
| Influence of texture and management practices on the forms and distribution of soil phosphorus JWB STEWART, IP O'HALLORAN, RG Kachanoski Canadian journal of soil science 67 (1), 147-163, 1987 | 87 | 1987 |
| Combined effects of soil disturbance and fallowing on plant and fungal components of mycorrhizal corn (Zea mays L.) Z Kabir, IP O'Halloran, C Hamel Soil Biology and Biochemistry 31 (2), 307-314, 1999 | 81 | 1999 |
| Spatial variability of soil test phosphorus, potassium, and pH of Ontario soils JD Lauzon, IP O'Halloran, DJ Fallow, AP von Bertoldi, D Aspinall Agronomy Journal 97 (2), 524-532, 2005 | 80 | 2005 |
| Estimating dissolved reactive phosphorus concentration in surface runoff water from major Ontario soils YT Wang, TQ Zhang, QC Hu, CS Tan, IPO Halloran, CF Drury, DK Reid, ... Journal of environmental quality 39 (5), 1771-1781, 2010 | 78 | 2010 |
| Overwinter survival of arbuscular mycorrhizal hyphae is favored by attachment to roots but diminished by disturbance Z Kabir, IP O'Halloran, C Hamel Mycorrhiza 7, 197-200, 1997 | 71 | 1997 |
| Kinetics of phosphorus forms applied as inorganic and organic amendments to a calcareous soil Y Audette, IP O'Halloran, RP Voroney Geoderma 262, 119-124, 2016 | 70 | 2016 |
| Spatial variability of soil phosphorus as influenced by soil texture and management IP O'HALLORAN, RG Kachanoski, JWB Stewart Canadian journal of soil science 65 (3), 475-487, 1985 | 70 | 1985 |
| Seasonal and event‐based drivers of runoff and phosphorus export through agricultural tile drains under sandy loam soil in a cool temperate region WV Lam, ML Macrae, MC English, IP O'halloran, JM Plach, Y Wang Hydrological Processes 30 (15), 2644-2656, 2016 | 57 | 2016 |
| Effects of tillage practices on phosphorus transport in tile drain effluent under sandy loam agricultural soils in Ontario, Canada WV Lam, ML Macrae, MC English, IP O'Halloran, YT Wang Journal of Great Lakes Research 42 (6), 1260-1270, 2016 | 52 | 2016 |
| Ammonia volatilization from liquid hog manure amended with paper products in the laboratory S Subair, JW Fyles, IP O'Halloran Journal of environmental quality 28 (1), 202-207, 1999 | 51 | 1999 |
| Effect of tillage and fertilization on inorganic and organic soil phosphorus IP O'Halloran Canadian Journal of Soil Science 73 (3), 359-369, 1993 | 51 | 1993 |
