You can become a Certified Crop Adviser by going through the completion steps  below:

1. Pass two comprehensive exams
2. Have at least 2 years experience with at least a Bachelor of Science Degree in agriculture or 4 years with no degree
3. Document education and crop advising experience with transcripts and supporting references
4. Sign and agree to uphold the CCA Code of Ethics

You can view all the steps and information about becoming a Certified Crop Adviser (CCA) at: http://www.agronomy.org/cca/