National Agencies/Associations
- AOSA | SCST: Analyzeseeds
- Association of Official Seed Certifying Agencies
- USDA U.S. Department of Agriculture
- American Seed Trade Association
- State Noxious – Weed Seed USDA List
- USDA Plants Database
South Dakota Agencies/Associations
- SDCIA – South Dakota Crop Improvement Association
- South Dakota Department of Agriculture & Natural Resources
- South Dakota Seed Program – Department of Agriculture & Natural Resources
- Seed Labeling and Advertising Guidelines
- SD Agricultural Experiment Station at SDSU
- SDSU Foundation Seed Stocks Division
- SDSU Department of Agronomy, Horticulture & Plant Science
- SDSU Extension
- SDSU Soil Testing Labs
- SDSU Plant Diagnostic Clinic
- South Dakota Agricultural Laboratories (Pesticide, herbicide, mineral feed, drug, proximate analysis)