I have a broad interest in using science to develop sustainable societies that provide for all people while preserving natural resources and biosphere integrity for future generations. Achieving this goal requires an understanding of the fundamental nature of managed ecosystems and the mechanisms that govern human-environmental interactions. The prospect of developing food production systems that enhance ecological processes while contributing to sustainability is a key idea guiding all facets of my work.
My research group conducts studies of soil nutrient cycling processes in agroecosystems at scales ranging from the rhizosphere to farm and watershed scales. We investigate mechanisms within the plant-soil-microbial continuum that control ecosystem processes such as energy flows and nutrient cycling. Current research projects are focused on achieving a better understanding of the biotic and abiotic mechanisms regulating linkages between carbon and nitrogen cycles, with particular emphasis on the following processes: 1) symbiotic biological N-fixation, 2) decomposition and mineralization and 3) microbially-mediated N transformations such as nitrification, denitrification. Our work is also geared toward the development of management practices that improve soil quality while optimizing carbon and nitrogen cycling in intensive horticultural systems. Most of our research involves some degree of interdisciplinary collaboration. We are currently working with colleagues from molecular microbial ecology, resource economics, environmental sociology, biogeochemical modeling and weed ecology.
Outreach and Extension Focus
I place a high value on my interactions with farmers and other practitioners. Over the years, these interactions have had considerable influence on the research that I have undertaken. My lab group carries out extension and outreach activities in conjunction with research through partnerships that entail the active participation of farmers. Currently we are engaged in on-farm research that addresses soil and nutrient management problems. Our educational activities are aimed at farmers who rely on green manures as nitrogen sources or who are interested in using cover crops in their farming system.
The graduate and undergraduate courses I teach integrate ecological and agricultural knowledge. My over-arching goal in teaching and mentoring students is to contribute to the development of scientists who will be equipped to address the global challenges we face in agriculture and environmental management. In my classes we engage in participatory, independent and collaborative learning and work to improve key life skills including critical and synthetic thinking, verbal and written communication. Graduate seminars that I have offered include 1) Decomposition, 2) Sustainability: Ethical, socioeconomic and biophysical dimensions, 3) Agroecosystems: Research and design.
Awards and Honors
- Outstanding contribution to agroecology (2013) Alianza de Mujeres en Agroecología-Alliance of Women in Agroecology
- Recognition for contributions to science and engineering (2011) Women in Science and Engineering Leadership Institute, University of Wisconsin
- Blesh, J. M., & Drinkwater, L. E. (2013). The impact of nitrogen source and crop rotation on nitrogen mass balances in the Mississippi River Basin. Ecological Applications. 23:1017-1035.
- Schipanski, M. E., & Drinkwater, L. E. (2012). Nitrogen fixation in annual and perennial legume-grass mixtures across a fertility gradient. Plant and Soil. 357:147-159.
- Schipanski, M. E., & Drinkwater, L. E. (2011). Nitrogen fixation of red clover interseeded with winter cereals across a management-induced fertility gradient. Nutrient Cycling and Agroecosystems. 90:105-119.
- Hufnagl-Eichiner, S., Wolf, S. A., & Drinkwater, L. E. (2011). Assessing socio-ecological coupling: Agriculture and hypoxia in the Gulf of Mexico. Global Environmental Change. Special Issue: The Politics and Policy of Carbon Capture and Storage. 21:530-539.
- David, M. B., Drinkwater, L. E., & Mclsaac, G. F. (2010). Sources of Nitrate Yields in the Mississippi River Basin. Journal of Environmental Quality. 39:1657-1667.
- Gardner, J. B., & Drinkwater, L. E. (2009). The fate of nitrogen in grain cropping systems: a meta-analysis of N-15 field experiments. Ecological Applications. 19:2167-2184.
- Drinkwater, L. E., & Snapp, S. S. (2007). Nutrients in agriculture: Rethinking the management paradigm. Advances in Agronomy. 92:163-186.
- Tonitto, C., David, M., & Drinkwater, L. E. (2006). Response of crop yields and soil N to diversified rotations: A meta-analysis. Agriculture, Ecosystems & Environment. 112:58-72.
Presentations and Activities
- Effects of long-term management on soil organic matter and weed competition in organic soybean. 2015. ASA, CSSA, and SSSA International Annual Meeting. ASA Section: Agronomic Production Systems.
- Weed management lessons from the Cornell Organic Grain Cropping Systems Experiment. 2015. ASA, CSSA, and SSSA International Annual Meeting. ASA Section: Agronomic Production Systems.
- Nitrogen Cycling and Soil Ecology Overview. Organic Cover Crop Workshop and Tour. November 2013. Sponsored by the USDA-NRCS Plant Materials Program, Cornell Cooperative Extension, and the Northeast Farming Association of New York (NOFA) Upper Susquehanna Coalition and NY State Department of Ag. and Markets. Big Flats Plant Materials Center, Corning, NY.
- Realizing resilient food systems from rhizosphere to watershed scales. Ecological Society of America Annual Meetings. August 2013. Ecological Society of America. Minneapolis, MN.
- Using the mass balance concept to promote sustainable nutrient management. Ecological Society of America Annual Meetings. August 2013. Ecological Society of America. Minneapolis, MN.
- Agricultural intensification in the Mississippi River Basin: Spatial heterogeneity, drivers and consequences. Ecological Society of America Annual Meetings. August 2012. Ecological Society of America. Portland, OR.
- Linkages between ecology, economics and ethics. Plenary session. Soil and Water Conservation Society Annual Conference. July 2012. Soil and Water Conservation Society. Ft. Worth, TX.