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University of Nebraska–Lincoln

Agronomy and Horticulture

The Science and Application of Plants to Sustain and Enhance Human Life

John Guretzky

Assistant Professor and
Grassland Systems Ecologist

Contact Information
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DEGREES:

  • B.S., Natural Resources (Environmental Studies), University of Nebraska-Lincoln, 1996
  • Ph.D., Crop Production and Physiology, Iowa State University, 2002
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RESEARCH INTERESTS:

  • Structure and function of grassland systems
    -Cool-season grass/legume pastures
    -Switchgrass and bioenergy grasses
    -Tallgrass prairie
    -Native rangeland
  • Grassland management strategies/systems
  • Integrated crop-livestock systems

TEACHING INTERESTS:

  • Forage crop and range management
  • Physiology and function of perennial grasses
  • Grassland systems ecology
  • Grassland research techniques and analysis

EXTENSION INTERESTS:

  • Providing land managers in Nebraska the best information available about grassland systems ecology to meet their production and ecosystem management goals.

SELECTED PUBLICATIONS:

  • Guretzky, J.A., M.K. Kering, J.T. Biermacher, and B.J. Cook. 2009. Switchgrass for forage and bioenergy: II. Effects of P and K fertilization. The Proceedings of the International Plant Nutrition Colloquium XVI. University of California, Davis. Online. http://repositories.cdlib.org/ipnc/xvi/1318.

  • Kering, M.K., J.T. Biermacher, B.J. Cook, and J.A. Guretzky. 2009. Switchgrass for forage and bioenergy: I. Effects of nitrogen rate and harvest system. The Proceedings of the International Plant Nutrition Colloquium XVI. University of California, Davis. Online. http://repositories.cdlib.org/ipnc/xvi/1158.

  • Guretzky, J.A., M. Kering, J.T. Biermacher, E. Funderburg, and J. Mosali. 2009. Forage yield stability and nutrient uptake of Midland bermudagrass. Journal of Plant Nutrition. In Press.

  • Guretzky, J.A., Ball, J., and Cook, B.J. 2008. Nitrogen fertilizer rate and weather dictate nutritive value of fall stockpiled bermudagrass. Online. Forage and Grazinglands doi:10.1094/FG-2008-0118-01-RS.

  • Guretzky, J.A., K.J. Moore, C.L. Burras, and E.C. Brummer. 2007. Plant species richness in relation to pasture position, management, and scale. Agriculture, Ecosystems & Environment. 122:387-391.

  • Guretzky, J.A., J.S. Fehmi, and A.B. Anderson. 2006. Grazing and military vehicle interaction on grassland soils and vegetation. Great Plains Research. 16:51-61.

  • Guretzky, J.A., K.J. Moore, E.C. Brummer, and C.L. Burras. 2005. Species diversity and functional composition of pastures that vary in landscape position and grazing management. Crop Science. 45:282-289.

  • Guretzky, J.A., K.J. Moore, C.L. Burras, and E.C. Brummer. 2004. Distribution of legumes along gradients of slope and soil electrical conductivity (ECa) in pastures. Agronomy Journal. 96:547-555.

  • Guretzky, J.A., K.J. Moore, A.D. Knapp, and E.C. Brummer. 2004. Emergence and survival of legumes seeded into pastures varying in landscape position. Crop Science. 44:227-233.

  • Guretzky, J.A. and S.M. Louda. 1997. Evidence for natural biological control: insects decrease survival and growth of a native thistle. Ecological Applications. 7:1330-1430.