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Extension > Manure management and air quality education > Archives > Nutrient Management Archive

Recently in the Nutrient Management Category

Les Everett - Water Resources Center Education Coordinator, U of M. Randy Pepin and Jose A. Hernandez - Extension Educators, University of Minnesota - Extension

Using grid soil sampling to guide manure application can be a profitable investment, is the conclusion from case studies based on eight Minnesota farms. In fields where there is a history of non-uniform manure application, targeting new manure applications to areas with lower phosphorus and potassium soil test values can result in considerable economic returns above the cost of grid soil sampling. Variable rate manure applicators are not required when fields can be divided into application and no-application zones, with supplemental nitrogen fertilizer in the no-manure zones. The brief case studies are available on the University of Minnesota Extension web page for Manure Management and Air Quality http://www.manure.umn.edu, under Grid Soil Sampling for Manure Application. An introduction, the eight case studies, and a set of short video presentations based on the case studies are available at http://z.umn.edu/gridsoilsampling.

Funding for the development of these case studies was provided by the McKnight Foundation.

University of Minnesota Extension is presenting workshops for livestock producers and ag professionals on the use of grid soil sampling to guide manure application. Grid soil phosphorus and potassium maps from Minnesota livestock farms are used to create manure application zones and manure exclusion zones within fields in order to maximize the economic value of the manure as a fertilizer replacement and minimize phosphorus in runoff. Determination of manure application rates and supplemental fertilizer where necessary are part of the demonstration and discussion. Eight case studies are posted on the UM Extension manure website, http://z.umn.edu/manure .

Since the number of workshops funded by the McKnight Foundation project grant is limited, we invite county feedlot officerss and NRCS/SWCD staff to attend one of the following workshops. The workshop presentation Powerpoint is available for those wishing to conduct their own workshops, and a few more workshops could be presented by Randy Pepin, UM Extension (pepin019@umn.edu).

Workshops have been held Feb. 12, 26, and 27. Remaining workshops and hosts are:.

March 5: 11 a.m., Lake Crystal American Legion, Diane DeWitt, UM Extension.
March 6: 1 p.m., Murray County Courthouse, Slayton, Mike Boersma, UM Extension.

Nutrient Management Planner for Minnesota software, version 4.0 for M.S. Windows 7 and Access 2010 is now available on a CD from UM Extension, http://www.extension.umn.edu, at the Extension Store. NMP helps producers and their advisors plan field-specific fertilizer and manure applications that meet crop needs and agency requirements. Recommendations are consistent with current University of Minnesota fertilizer recommendations, the USDA-NRCS-Minnesota 590 (Nutrient Management) Standard, and Minnesota State 7020 Feedlot Rules. The software generates reports that meet NRCS and MPCA requirements, and that serve producers' farm management needs. The software includes a farm nutrient supply and demand calculator to determine the acres needed for manure applications. NMP V 4.0 requires a computer with MS Windows 7 and MS Access 2010. More information is at http://z.umn.edu/nmp.

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