Certified Crop Advisers (CCAs) are partners with farmers on the front lines of critical decisions in agriculture. The Certified Crop Adviser (CCA) is a program of the American Society of Agronomy and is a benchmark of professionalism in the industry. Farmers prefer to work with Certified Crop Advisers (CCA) because CCAs have demonstrated they have the commitment, education, expertise, and experience to make a difference in a client's business.