Organismes américains de certification des semences
- Association of Official Seed Certifying Agencies
- California Crop Improvement Association
- Colorado Seed Growers’ Association
- Idaho Crop Improvement Association
- Illinois Crop Improvement Association
- Indiana Crop Improvement Association
- Iowa Crop Improvement Association
- Minnesota Crop Improvement Association
- New Mexico Crop Improvement Association
- North Carolina Crop Improvement Association
- Ohio Seed Improvement Association
- Oklahoma Crop Improvement Association
- Oregon Seed Certification
- Wisconsin Crop Improvement Association
