IMMAG - Iowa Manure Management Action Group

Contact us

(515) 294-9590 or e-mail

September IMMAG Update

Welcome to the monthly update for the Iowa Manure Management Action Group (IMMAG) Web site. This update is provided as a service to inform you about changes made to the IMMAG Web Page or items of interest dealing with manure management and air quality from animal feeding operations. If you wish to subscribe to this mailing please click here. You may also view this update with direct links on the CURRENT NEWS site on IMMAG.



The Current News page on the IMMAG site is updated weekly. Please check this site often for the latest news regarding animal feeding operations and manure management issues. Recent regulatory updates by the DNR require that farmers, applicators and consultants stay on top of new regulations. I encourage you to read any newsletters, magazines or farm papers you receive. Plan to attend local extension meetings, local producer group meetings, watershed meetings or other events to stay informed. I would also encourage you to use discretion in what you may read or hear as not all of the information pertaining to regulatory changes is being accurately shared.  If you are making changes to your animal feeding operation, or hear something you question, call the local DNR field office, your commodity group representative, ISU Extension or the Coalition to Support Iowa Farmers for assistance with your questions.

One new requirement effective as of September 15 is the method by which we identify the soils used in the RUSLE2 software to calculate soil loss for the Iowa Phosphorus Index. In the past, the DNR required use of "the most erosive soil map unit that is at least 10 percent of the total field area.” The new requirement refers directly to NRCS Tech Note 29 to use the dominant critical soil map unit. This rule applies to all new MMPs beginning September 15 and all MMP updates as they come due.

Are you considering hiring a commercial manure applicator to load, haul or land-apply manure this fall? Read the latest IMMAG article, Hiring a Commercial Manure Applicator, for tips on hiring a commercial manure applicator and a link to a list of currently certified manure application businesses licensed in Iowa.


Don’t forget to meet manure applicator certification requirements prior to land application of manure this fall. Please contact your County Extension Office to schedule time to meet the required annual training or contact your local DNR Field Office to schedule time to take the certification exam. If you need to determine you current certification status, contact the DNR at 515-281-8648. Please state you are a manure applicator. Additional information can be found on the ISU Manure Applicator Certification Web Page at: or on the DNR’s Web page at:


The IMMAG Events page is a compilation of manure management related events. Please check the events page often for new listings.

October 15. The Livestock and Poultry Environmental Learning Center will be hosting the webcast "NAQSAT, a Tool for Determining Opportunities to Reduce Air Emissions from Swine and Poultry Farms". This webcast will take place at 1:30 p.m. central.  To view this webcast click here for more information. If you are not able to participate on October 15, the webcast will be archived to watch at a later date.

The National Air Quality Site Assessment Tool (NAQSAT) was developed for poultry and livestock producers to assist in determining the areas on their operations where opportunities exist to make changes that will result in reduced air emissions. The tool addresses eight concerns that relate to air emissions: animals and housing, feed and water, collection and transfer of manure, manure storage, land application, mortalities, on-farm records and public perception. NAQSAT can be used for swine, dairy, beef, broilers chickens, laying hens and turkeys operations. It is an on-line tool, developed for voluntary and educational use, available to the public at:

Have a safe harvest and manure application season,



Angela Rieck-Hinz
2104 Agronomy Hall
Iowa State University
Ames, IA 50011
(515) 294-9590
Iowa Manure Management Action Group

Manure sampling - Click on photo to enlarge

Manure sampling.


Newest IMMAG update available.