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Extension > Garden > SULIS > Maintenance > Sustainable Woody Plant Maintenance > References

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Pirone, P.P., Hartman, J.R., Sall, M.A. and Pirone, T. P., "Tree Maintenance", Oxford University Press, NY 1988.

Sinclair, Wayne A., Lyon, Howard H. and Johnson, Warren T., "Diseases of Trees and Shrubs", Cornell University Press, Ithaca NY, 1987.

University of Minnesota Extension, "Pruning Trees and Shrubs", FO-00628, Mike Zins and Deborah Brown, 2002;

University of Minnesota Extension, "A Practitioner's Guide to Stem Girdling Roots", BU-07501, Gary R. Johnson and Richard J. Hauer, 2002;

University of Minnesota Extension "Tree Fertilization: A Guide for Fertilizing New and Established Trees in the Landscape", FO-07410, Jeff Gillman and Carl Rosen, 2000;

University of Minnesota Extension "Protecting Trees and Shrubs Against Winter Damage", FO-01411, Bert T. Swanson and Richard Rideott, 2004;

University of Wisconsin Extension, "Caring for Your Established Shade Trees", A1817, E.R. Hasselkus, 1993;

University of Wisconsin Extension, "Caring for Deciduous Shrubs", A1771, E.R. Hasselkus, 1999;

University of Wisconsin Extension, "Deciduous Shrubs, How to Properly Prune", X1015, Laura Jull, 1999;

University of Wisconsin Extension, "Deciduous Trees, How to Properly Prune", X1014, Laura Jull, 1999;

University of Wisconsin Extension, "Evergreens - Planting and Care", A1730, E.R. Hasselkus,

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