IMMAG Updates

May 2013

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.


Follow iowamanure on Twitter The Current News page on the IMMAG site is updated weekly. Follow the Iowa Manure Management Action Group on Twitter at @iowamanure.

Nitrogen Issues: Wet conditions are causing crop and livestock producers to think about nitrogen management.  Two articles recently written by John Sawyer, ISU soil fertility extension specialist, will be of interest to most as we consider how much nitrogen may be available in the soil profile and how best and when to apply nitrogen yet this spring.

Wet Conditions and Change in Soil Profile Nitrate

Apply Nitrogen or Plant Corn

The IMMAG feature article this month is from Jeremy Klatt at Iowa DNR.  In Commercial Nitrogen Application to Fields in DNR Manure or Nutrient Management Plans, Jeremy reminds livestock producers with manure and nutrient management plans that all nitrogen must be accounted for and documented in your manure management plan. He also reminds us that if the maximum nitrogen rate was applied in the fall, livestock producers can’t apply additional N in the spring unless they verify the need via the late spring soil nitrate test.

What does Palmer Amaranth have to do with a manure management newsletter? A recent article in Integrated Crop Management News, by Bob Hartzler and Mike Owen, ISU weed science extension specialists, describes Palmer amaranth and the risk of it appearing in Iowa.  Livestock producers importing by-products of cotton production (gin trash, cotton seed, etc.) for animal feed have a higher risk for infestation and consequently fields receiving manure from animals fed these by-products are also at risk. You can learn more about this invasive weed species, risk and management by reading the ICM News article Troublesome Palmer Amaranth Expanding Its Range.

Continued rain (and in some places snow) in early May have extended the opportunity to evaluate the water quality in streams below open feedlots and dairy yards. Iowa DNR has partnered with Iowa State University Extension and Outreach to place water quality test kits in 20 county Extension offices. This test is free and confidential and the only person to see the results is the livestock producer.  Information about the testing procedure is found in the fact sheet Testing the Waters: A Beef and Dairy Producers’ Guide to Check Water Quality Below Open Lotsand in the video Clean Water in our Hands: A Guide for Water Testing for Beef and Dairy Producers. The fact sheet, video, and list of county Extension offices offering the water quality testing kits, and other resources can be found on the Small Feedlots and Dairy Operations web page on the IMMAG site. ISU Extension and Outreach Ag Engineers Beef and Dairy Field Specialists are available to help answer questions and provide solutions to eliminate runoff from feedlots.  Other sources for regulatory and technical assistance include NRCS, DNR and the Coalition to Support Iowa Farmers.


Here is a list of links to Nitrogen Management Publications:

PM1714 Nitrogen Fertilizer Recommendations for Corn in Iowa

Corn N Rate Calculator

PM 2015 Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn

SP0435 "Iowa Strategy to Reduce Nutrient Loss: Nitrogen Practices."

I currently have extra supplies of the following two DVDs. If you would like your own personal copy, please send me an email with your mailing address and I will send them to you. Both videos are also available on the IMMAG Manure Videos web page.

Determine Your Manure Management Plan Due Date. This 13 minute created by ISU Extension and Outreach and funded by the Iowa Pork Producers Association walk you through how to use the DNR animal feeding operations database to determine the annual due date for your manure management plan, and when the new plan is due every 4 years.

Clean Water in Our Hands: A guide for Water Testing for Beef and Dairy Producers. This 9 minute video was produced by the Iowa Department of Natural Resources and the Iowa Cattlemen’s Association, with partial funding from EPA Region 7 through a 319 grant. This video teaches livestock producers how to take  water samples below their livestock operation to determine if potential runoff is having an impact on the stream.


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

The next Livestock and Poultry Environmental Learning Center (LPELC) webinar is scheduled for May 17 at 1:30 p.m. (central). The webinar will feature two beef producers talking about their mono-slope buildings for beef production. Ron and Clayton Christensen from Royal, IA, and  Nick Mack, from Watertown, SD, will discuss mono-slope barn design, why they chose this type of production facility, management considerations such as bedding, feeding and manure handling, and regulations that affect this type of production system.  Beth Doran, ISU Extension and Outreach Beef Specialist, will review management options for mono-slopes. For more information and instruction on how to access the webinar please see:

The North American Manure Expo is scheduled for August 21, 2013 near London, Ontario. More information will be posted to the IMMAG website as it becomes available.


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

Copyright © 2013, Iowa State University. All rights reserved.


Current News Archives