Associate Professor, School of Integrative Plant Science Soil and Crop Sciences Section
Matthew Ryan is an agroecologist and conducts research on sustainable cropping systems. Over the next several decades, farmers need to adapt to increased climate variability, decrease their environmental impact, and feed billions of more people. Despite these challenges, it is an exciting time to be involved in agriculture, as more consumers want to know about the practices used to produce their food and new farmers are increasingly from non-farm backgrounds.
Sustainable cropping systems and agroecology
Cover crops and ecological weed management
Matthew Ryan conducts research on agroecology and sustainable cropping systems. He works with farmers, extension educators, researchers, and others to develop solutions to problems in agriculture.
Replacing external inputs with ecological processes and more fully utilizing biotic interactions is a central theme. Matthew explores the use of crop rotation, cover crops, and intercropping to diversify cropping systems, regenerate soil health, enhance biodiversity, suppress weeds and other pests, and increase resilience to climate change. He also conducts research on perennial grain crop production and market development. In addition to applied agronomic field research, Matthew is interested in digital agriculture, theoretical ecology, social ecological systems, and sustainability assessment.
- Wallace, J. M., Curran, W. S., Mirsky, S. B., & Ryan, M. (2017). Tolerance of Interseeded Annual Ryegrass and Red Clover Cover Crops to Residual Herbicides in Mid-Atlantic Corn Cropping Systems. Weed Technology. 31:641-650.
- Ann Bybee-Finley, K., Mirsky, S. B., & Ryan, M. (2017). Crop biomass not species richness drives weed suppression in warm-season annual grass-legume intercrops in the northeast. Weed Science. 65:669-680.
- Jernigan, A. B., Caldwell, B. A., Cordeau, S., DiTommaso, A., Drinkwater, L. E., Mohler, C. L., & Ryan, M. (2017). Weed abundance and community composition following a long-Term organic vegetable cropping systems experiment. Weed Science. 65:639-649.
- Liebert, J. A., & Ryan, M. (2017). High Planting Rates Improve Weed Suppression, Yield, and Profitability in Organically-Managed, No-till Planted Soybean. Weed Technology. 31:536-549.
- Liebert, J. A., DiTommaso, A., & Ryan, M. (2017). Rolled Mixtures of Barley and Cereal Rye for Weed Suppression in Cover Crop-based Organic No-Till Planted Soybean. Weed Science. 65:426-439.
- Mirsky, S. B., Ackroyd, V. J., Cordeau, S., Curran, W. S., Hashemi, M., Reberg-Horton, S. C., Ryan, M., & Spargo, J. T. (2017). Hairy Vetch Biomass across the Eastern United States: Effects of Latitude, Seeding Rate and Date, and Termination Timing. Agronomy Journal. 109:1510-1519.
- DeHaan, L. R., Van Tassel, D. L., Anderson, J. A., Asselin, S. R., Barnes, R., Baute, G. J., Cattani, D. J., Culman, S. W., Dorn, K. M., Hulke, B. S., Kantar, M., Larson, S., Marks, M. D., Miller, A. J., Poland, J., Ravetta, D. A., Rude, E., Ryan, M., Wyse, D., & Zhang, X. (2016). A pipeline strategy for grain crop domestication. Crop Science. 56:917-930.
- Bybee-Finley, K., Mirsky, S. B., & Ryan, M. (2016). Functional Diversity in Summer Annual Grass and Legume Intercrops in the Northeastern United States. Crop Science. 56:2775-2790.
- Giuliano, S., Ryan, M., Véricel, G., Rametti, G., Perdrieux, F., Justes, E., & Alletto, L. (2016). Low-input cropping systems to reduce input dependency and environmental impacts in maize production: A multi-criteria assessment. European Journal of Agronomy. 76:160-175.
- Schipanski, M., Barbercheck, M., Douglas, M., Finney, D., Haider, K., Kaye, J., Kemanian, A., Mortensen, D., Ryan, M., Tooker, J., & White, C. (2014). A conceptual framework for evaluating multifunctionality of cover crops in agroecosystems. Agricultural Systems. 125:231-237.
Presentations and Activities
- Corn, soybean, and wheat yields in an organic rotational no-till system during the 3-year transition. 2015. Weed Science Society of America.
- Evaluating tolerance of inter-seeded cover crops to pre-emergent herbicides for corn production in the mid-Atlantic. 2015. Northeastern Weed Science Society.
- Evaluation of different cover crops in interseeded corn. 2015. ASA, CSSA, and SSSA International Annual Meeting. ASA Section: Agronomic Production Systems.
- Farmer perspectives on cover crop breeding. 2015. ASA, CSSA, and SSSA International Annual Meeting. ASA Section: Agronomic Production Systems.
- Higher soybean planting rates increase weed suppression, yields, and profitability in cover crop-based, organic, no-till soybean. 2015. ASA, CSSA, and SSSA International Annual Meeting. ASA Section: Agronomic Production Systems.
- Influence of cover crop termination timing and high-residue cultivation on weed communities in a reduced-till organic grain system. 2015. Proceedings of the Weed Science Society of America .
- Interseeding cover crops in corn: Impacts on corn yield and cover crop biomass production in the Mid Atlantic. 2015. ASA, CSSA, and SSSA International Annual Meeting. ASA Section: Agronomic Production Systems.
- Traits that matter: Meeting farmers needs through improved cover crop performance. 2015. ASA, CSSA, and SSSA International Annual Meeting. ASA Section: Land Management & Conservation.
- Weed-soybean competition in a long term organic cropping systems experiment. 2015. Northeastern Weed Science Society.
- Strategies for Success with Organic Weed Management. Growing PA Organic Farms. December 2015. PA Farm Link. Harrisburg, PA.
- PLSCS 1900: Sustainable Agriculture: Food, Farming, and the Future
- PLSCS 3800: Principles and Practices in Certified Organic Agriculture
1113 Bradfield Hall
Ithaca, NY 14853
mrr232 [at] cornell.edu
- Soil and Crop Sciences
- Sustainable Cropping Systems Lab
- Organic @ Cornell
- Seminar video: Promises, problems and progress with perennial grains in New York
The Pennsylvania State University
- Master of Science
The Pennsylvania State University
- Bachelor of Science
- Soil and Crop Sciences
Matt in the news
A survey of farmers in four Northeast states, including New York, found that incentive payments encouraged participants to plant twice as many acres of cover crops as they did prior to receiving funds – a change that can both improve their farms...
- School of Integrative Plant Science
- Soil and Crop Sciences Section
More than 140 farmers, educators, consultants and researchers viewed the latest Cornell grain and forage crop research at 2023 Musgrave Research Farm Field Day in Aurora, N.Y., August 3. “As leaders in agriculture research, it’s really important...
- Cornell University Agricultural Experiment Station
- Musgrave Research Farm