Dry Manure Applicator Certification Program

Rachel Klein, P&S, Agronomy Department


House File 2494 passed in 1998 and required commercial manure applicators and confinement site livestock producers, of a certain size, to be certified to land apply manure in the state of Iowa.  With this ruling, the Iowa Department of Natural Resources was designated as the regulatory agency and Iowa State University Extension was designated to provide the educational and training portion of the certification program. 


The objective was to find out if dry poultry manure commercial and confinement applicators have or would adopt manure management practices they received in their certification training from Iowa State University Extension in 2007.


In 2007, there were five dry poultry manure applicator workshops delivered in five cities in Iowa; Sac City, Greenfield, Washington, Clarion, and Thompson. The workshops were designed specifically for commercial and confinement dry poultry manure applicators and their concerns with the dry manure application process. There was a total 110 applicators at the workshop sites; ISUE received 80 evaluations.  The applicators were asked if they had or would plan to adopt the practices of evaluating distribution of dry poultry manure during application to change the spread pattern and if they would change any nutrient management practices based on the poultry manure research and the eggshell liming study presented in the workshop. 

The applicators were also asked about last years program; if they implemented a plan for how and where they stockpiled manure to meet regulatory requirements and if they took manure samples for nutrient analysis.


After each of the training programs, all of the applicators were asked to fill out an evaluation sheet on that days training workshop.

In 2007, 56% of the dry manure applicators reported they evaluate the distribution pattern of manure during application; 23% planned to adopt this practice.   The poultry manure research presented information about nutrient management planning, 41% of the applicators reported they have nutrient management plans in place, and 37% said they plan to adopt a nutrient management plan. 

The last two questions were based on the results from last years training; 58% said they implemented a plan for how and where they stockpile manure to meet regulatory requirements; 13% said they did not adopt the practice.  The final question asked the applicators if they took manure samples for nutrient analysis: 70% said they adopted the practice while 5% said they did not adopt the practice.

July 20, 2007
160 Natural Resources and Stewardship

Page last updated: August 2, 2007
Page maintained by Linda Schultz, lschultz@iastate.edu