Links
- Penn State Weed Management
- Penn State Agroecology Program
- Penn State Ecology Program
- Penn State Department of Crop and Soil Sciences
- The Center for Dirt and Gravel Road Studies
- USDA-ARS Sustainable Systems Laboratory
- Wageningen University Crop and Weed Ecology Group
- The Nature Conservancy
- Pennsylvania Association for Sustainable Agriculture
- Northeastern Weed Science Society
- Weed Science Society of America
- European Weed Science Society