Patrick Drohan
Professor of Pedology

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452 Agricultural Sciences and Industries Building
University Park, PA 16802 - pjd7@psu.edu
- 814-863-4246
Research Summary
Soil formation and biogeochemistry due to land use and ecosystem change; soil and water degradation, and the remediation of soil physical and chemical properties in urban environments.
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Publication Tags
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Soil Carbon Climate Change Water Quality Ecosystem Water Index Soil Science Weather Regolith Deer Weathering Wastewater Manure Energy Utilization Biochar Shale Gas Surface Roughness Bedrock Forests Shale Roughness Soils Water Content HabitatMost Recent Publications
Development and Validation of a Phosphorus Critical Source Area Index for Ridge and Valley Physiographic Province Agricultural Runoff Management
Emily Lesher, Patrick Drohan, Jhony Benavides, J Weld, Ian Thomas, Peter Kleinman,
Monitoring belowground processes and responses of bioavailable soil nutrients in arid ecosystems
Brenda Vaness, Patrick Drohan, S Collins, Merilynn Hirsch, Douglas Merkler, Joseph Fargione, Brenda Buck, Chelsea Crenshaw, Etsuko Nonaka, James Elliott, others,
Moses A. Ajemigbitse, AquaBlok Ltd, Swanton, Ohio Daniel J. Bain, Geology and Environmental Science, University of Pittsburgh, Pennsylvania Margaret C. Brittingham, Department of Ecosystem Science and Management, Penn State University
Tetiana Cantlay, Rosemary Capo, Elizabeth Dakin, Shay Dougall, Patrick Drohan, David Eaton, John Graham, W Griffin, Robert Howarth,
Developing Ecological Sites and Associated State-\&-Transition Models to Anticipate Dynamic Ecosystem Responses to Disturbance in Complex Landscapes of North Central Pennsylvania
W Alex, Paul Roth, Michael Marsicano, Patrick Drohan,
What Can We Learn from Mn-Coated IRIS?
Martin Rabenhorst, Patrick Drohan, John Galbraith, Lesley Spokas, Mark Stolt, James Thompson, Bruce Vasilas, Karen Vaughan, Gary Jellick,
16802 USA 4 The Pennsylvania State University, Department of Plant Science, University Park, PA 16802 USA v.* Corresponding author Roger T. Koide
S Peoples, Paul Adler, Patrick Drohan,
Stable Soil Moisture Alleviates Water Stress and Improves Morphogenesis of Tomato Seedlings
Ge Li, Huaiyu Long, Renlian Zhang, Patrick J. Drohan, Aiguo Xu, Li Niu, 2023, Horticulturae
Water quality benefits of weather-based manure application timing and manure placement strategies
Arghajeet Saha, Raj Cibin, Tamie L. Veith, Charles White, Patrick J. Drohan, 2023, Journal of Environmental Management on p. 10
Soil and geomorphic patterns within relict charcoal hearths could represent unique ecosystem niches
S. Bayuzick, D. Guarin, J. Benavides, A. Bonhage, F. Hirsch, Duane R Diefenbach, M. McDill, T. Raab, P. J. Drohan, 2023, Geomorphology
Species and physiographic factors drive Indian cucumber root and Canada mayflower plant chemistry: Implications for white-tailed deer forage quality
Nico Navarro, Duane R Diefenbach, Marc Eric McDill, Emily J. Domato, Christopher S. Rosenberry, Patrick J. Drohan, 2023, Journal of Environmental Management
Most-Cited Papers
Weathering of rock to regolith: The activity of deep roots in bedrock fractures
Elizabeth A. Hasenmueller, Xin Gu, Julie N. Weitzman, Thomas S. Adams, Gary E. Stinchcomb, David M. Eissenstat, Patrick J. Drohan, Susan L. Brantley, Jason P. Kaye, 2017, Geoderma on p. 11-31
Residential demolition and its impact on vacant lot hydrology: Implications for the management of stormwater and sewer system overflows
W. D. Shuster, S. Dadio, P. Drohan, R. Losco, J. Shaffer, 2014, Landscape Planning on p. 48-56
Watershed-Scale Impacts from Surface Water Disposal of Oil and Gas Wastewater in Western Pennsylvania
William D. Burgos, Luis Castillo-Meza, Travis L. Tasker, Thomas J. Geeza, Patrick J. Drohan, Xiaofeng Liu, Joshua D. Landis, Jens Blotevogel, Molly McLaughlin, Thomas Borch, Nathaniel R. Warner, 2017, Environmental Science & Technology on p. 8851-8860
Biochar amendment of soil improves resilience to climate change
Roger T. Koide, Binh T. Nguyen, R. Howard Skinner, Curtis J. Dell, Matthew S. Peoples, Paul R. Adler, Patrick J. Drohan, 2015, GCB Bioenergy on p. 1084-1091
The joy of teaching soil science
Alfred E. Hartemink, Megan R. Balks, Zueng Sang Chen, Patrick Drohan, Damien J. Field, Pavel Krasilnikov, David J. Lowe, Martin Rabenhorst, Ken van Rees, Peter Schad, Louis A. Schipper, Marthijn Sonneveld, Christian Walter, 2014, Geoderma on p. 1-9
The use of LiDAR terrain data in characterizing surface roughness and microtopography
Kristen M. Brubaker, Wayne L. Myers, Patrick J. Drohan, Douglas A. Miller, Elizabeth W. Boyer, 2013, Applied and Environmental Soil Science
Linear infrastructure drives habitat conversion and forest fragmentation associated with Marcellus shale gas development in a forested landscape
Lillie A. Langlois, Patrick J. Drohan, Margaret C. Brittingham, 2017, Journal of Environmental Management on p. 167-176
Spatial variability of heavy metal ecological risk in urban soils from Linfen, China
Pingguo Yang, Patrick J. Drohan, Miao Yang, Hongjun Li, 2020, Catena
Turnover of soil carbon following addition of switchgrass-derived biochar to four soils
Binh T. Nguyen, Roger T. Koide, Curtis Dell, Patrick Drohan, Howard Skinner, Paul R. Adler, Andrea Nord, 2014, Soil Science Society of America Journal on p. 531-537
Using Kaya and LMDI models to analyze carbon emissions from the energy consumption in China
Pingguo Yang, Xiao Liang, Patrick J. Drohan, 2020, Environmental Science and Pollution Research on p. 26495-26501
News Articles Featuring Patrick Drohan
Jul 20, 2023
USDA grant funds study of effectiveness of vegetation to curb water pollution
At a time when Pennsylvania is actively working to achieve water-quality improvements to meet the state’s obligations for cleaning up the Chesapeake Bay, a multidisciplinary Penn State research team is studying whether agricultural pollution-prevention devices called riparian buffers are working properly.
Full Article
Oct 02, 2020
Harvesting vegetation on riparian buffers barely reduces water-quality benefits
Allowing farmers to harvest vegetation from their riparian buffers will not significantly impede the ability of those streamside tracts to protect water quality by capturing nutrients and sediment — and it will boost farmers’ willingness to establish buffers.
Full Article
May 07, 2019
Institutes of Energy and the Environment announces seed grant recipients
Several Huck researchers are among the recipients of 2018-19 IEE seed grants.
Full Article