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| How to Use Lessons |
| These lessons are available free on this site; however,
there is a fee for those taking the quizzes for academic or professional
credit (Continuing Education Units). Quizzes are available by password after
registering for use. Contact your instructor or professional society for
more details. For the American Society of Agronomy, call (608) 273-8080
or email educationcoordinator@agronomy.org
Please see the licensing agreement regarding arrangements for other uses.
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