Category 14 (Fertilizer Management) Certification

When does a farmer need to have a Category 14 (Fertilizer Management) Certification?

1.) If a farmer is applying commercial fertilizer (Nitrogen, Phosphorous, Potassium) on his own fields, there is no need for a certification.

2.) If a farmer is applying manure not from a Confined Feeding Operation, there is no need for a certification.

3.) If a famer is applying less than 10 cubic yards of manure from a Confined Feeding Operation, there is no need for a certification.

4.) If a farmer is applying more than 10 cubic yards of manure from a Confined Feeding Operation, they will need Category 14 Certification and to keep the proper records.

5.) If a farmer is applying to someone else’s land, they need a Category 14 certification and they will need to apply for a commercial For Hire license as well as a business license.

Category 14 includes: Commercial for-hire fertilizer applicators and businesses using commercial fertilizers or manure from a confined feeding operation (CFO) in the production of agricultural crops.

Here’s the web page with more information: https://www.oisc.purdue.edu/pesticide/fert_app_cert_rule.html

Featured Stories

A veteran in her military uniform is smiling.

Supporting veterans year-round with resources for success

Purdue Extension, in partnership with the National AgrAbility Project and Indiana AgrAbility,...

AAS sign for Marion County Demo Garden amongst bed of flowers

Marion County Demo Garden is First Place Winner in AAS Challenge

Marion County’s very own Purdue Extension Demonstration Garden takes a first-place Category...

Program to Assist Ag Producers with Farm Finances

Are you ready to take control of your farm’s financial future? Know Your Numbers, Know Your...

November-December Newsletter 2025

Purdue Extension Knox County 2025 Newsletter, featuring news in all of our program areas. Learn...

November 2025 Newsletter

Updates, recaps, general info and more

Wells County - Admin Assistant Application form