Becoming a Certified Commercial Applicator

If you apply fertilizers or manure for hire in Indiana, you are required to be certified as a Category 14: Agricultural Fertilizer Applicator.

If you apply, transport, or handle fertilizer manure for hire, you are also required to have a Fertilizer Business License.

Steps to Certification

  1. Study the Manual: Review the CAT 14 Agricultural Fertilizer Applicator Manual (source: Purdue Extension Education Store)
  2. Register for the Exam: Schedule your test through Metro Institute. 
  3. Pass the Exam: A passing score is required to receive certification.
  4. Apply for Certification: Submit paperwork and pay required fees to OISC.

Maintaining Your Certification

  • Yearly renewal of license
    • License must be connected to a fertilizer business license
  • Earn three (3) Continuing Certification Hours (CCHs) during the five (5) year certification cycle to keep your certification.
  • Keep application records as required by law.