If your school does not offer course credit for internships or cooperative education, you should still seek one out on your own. Many employers prefer applicants with volunteer or work experience in the field. In addition, your internship supervisor may serve as a reference for your future job applications.
For information about farm occupations, opportunities, and 4-H activities in your area, contact your local county extension service office.
If you're interested in studying agriculture at an international scope, you should also take courses in a second language, international relations, and geography.