Odor and Nutrient Management Newsletter

Fall 2004

Manure management plan changes

by Jeremy Klatt, Nutrient Specialist, Iowa Department of Natural Resources

Several changes were made in the Department of Natural Resources (DNR) rules for manure
management plans (MMPs). These changes were effective August 25, 2004, for confinement feeding operations that are required to file MMPs with the DNR. The changes include some additional requirements for nitrogen based manure application and for recordkeeping. Also, after October 25, 2004 those producers who have not submitted an original MMP to the DNR, will need to incorporate the phosphorus index into their next plan submittal.

Confinement dairy operation
Confinement dairy operation

Revised requirements
Producers will no longer be allowed to apply nitrogen
(N) at one-and-one-half times the N rate when soil tests indicate that low or very low soil phosphorus
(P) or potassium is present. If an MMP has already been developed for this fall using the one-and-one-half times N rate, those rates can be used for fall manure application provided the phosphorus or potassium concentrations are below optimum levels. However, MMPs must be updated before submitting the 2005 annual update to the DNR to reflect this rule change. Producers are asked to indicate this change on the MMP update short form.

Starting August 25, 2004, producers must keep records of several new items in addition to the records that are already required. These new items are:

  • Optimum yield for the planned crop
  • Types of nitrogen credits and amounts
  • Remaining crop nitrogen needed
  • Nitrogen content and first year nitrogen availability of the manure
  • Maximum allowable manure application rate.

Producers will still be required to keep records of the date, location, rate and method of manure application.

Also effective August 25, 2004, producers must keep their current MMP within 30 miles of the production site. Finally, don’t throw out those old application records because effective August 25, 2006, producers will be required to have five years of records on file instead of three.

Producers will need to record the following items in addition to the above recordkeeping requirements when the P index is required:

P content of the manure
If P-based rates are used, indicate the crop rotation that the rate is based on and the P removal of that rotation

The DNR has developed a new recordkeeping form that producers may use. This form is available at www.iowadnr.com on the DNR’s animal feeding operations page. The manure management plan rules can also be found on DNR’s animal feeding operations page.

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Page last updated October 5, 2004

Iowa Manure Matters: Odor and Nutrient Management is published by Iowa State University Extension, with funding support from the USDA Natural Resource Conservation Service through Cooperative Agreement No. 74-6114-8-22. To subscribe or change the address of a current subscription, write to Angela Rieck-Hinz, 2104 Agronomy Hall, Iowa State University, Ames, Iowa, 50011-1010 or call 515-294-9590, fax 515-294-9985 or email: amrieck@iastate.edu. Please indicate you are inquiring about the Odor and Nutrient Management Newsletter. The newsletter's coordinators are Angela Rieck-Hinz, extension program specialist, Department of Agronomy, Wendy Powers, environmental extension specialist, Department of Animal Science, and Robert Burns, Department of Agricultural and Biosystems Engineering; the editor is Jean McGuire, the subscription manager is Rachel Klein, the production designer is Beth Kroeschell, and the web page designer is Liisa Jarvinen.

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