Proceedings of the 2009 Wisconsin Crop Management Conference 13-15 January 2009 Exposition Hall, Alliant Energy Center Madison, Wisconsin Program Co-Chairs: Carrie A.M. Laboski Chris Boerboom Department of Soil Science Department of Agronomy Cooperative Extension University of Wisconsin-Extension and College of Agricultural and Life Sciences University of Wisconsin-Madison Appreciation is expressed to the Wisconsin fertilizer industry for the support provided through the Wisconsin Fertilizer Research Fund for research conducted by faculty within the University of Wisconsin System. The assistance provided by Carol Duffy and Bonner Karger in preparation of this docu- ment is appreciated. THESE PROCEEDINGS ARE AVAILABLE ONLINE IN A SEARCHABLE FORMAT AT: http://www.soils.wisc.edu/extension/wcmc/ “University of Wisconsin-Extension, U.S. Department of Agriculture, Wisconsin counties cooperating and providing equal opportunities in employment and programming including Title XI requirements.” Proc. of the 2009 Wisconsin Crop Management Conference, Vol. 48 i