Address
254 Alderman Hall
1970 Folwell Avenue
St. Paul, MN 55108

Links
www.turf.umn.edu

Dr. Horgan's interests revolve around nutrient fate and general turfgrass management. Specifically, he is interested in improving our nitrogen and phosphorus fertilizer recommendations, gaining a better understanding of the fate of phosphorus in our environment, and utilizing organic nitrogen fractions in the soil to create an N-credit program. He will be evaluating turfgrass species and cultivars to help provide information to the turfgrass managers around Minnesota and the northern climate states. In addition, he is the turfgrass extension specialist. This title gives him an excellent opportunity to interact with the industry and facilitate educational programs designed to meet the needs of the state. He is the faculty advisor to the Horticulture Club and the student chapter of the Golf Course Superintendents Association of America.

Recent Publications

• Nett, M.T., M.J. Carroll, B.P. Horgan and A.M. Petrovic (ed).  2008.  The fate of nutrients and pesticides in the urban environment.  Am. Chem. Soc. Symposium 997.  Oxford Univ. Press, Oxford.

• Gardner, D.S., B.P. Horgan and B.J. Horvath.  2008.  Spatial Variability of the Illinois Soil Nitrogen Test:  Implications for sampling in a turfgrass system. Crop Sci. 48:2421-2428.

• Baker, L.A., B. Wilson, D. Fulton and B.P. Horgan.  2008. Disproportionality as a framework to target pollution reduction from urban landscapes. Cities and the Environment.  1 (2) Article 7, 15 pp.  http://escholarship.bc.edu/cate/vol1/iss2/7
  

• Ellram, A., B.P. Horgan, B. Hulke.  2007.  Mowing and dew removal to minimize dollar spot on creeping bentgrass.  Crop Sci.  47:2129-2137.
  

• Sass, J.F. and B.P. Horgan.  2006.  Irrigation scheduling on sand based creeping bentgrass:  Evaluating evapotranspiration estimation, capacitance sensors and deficit irrigation.  Online.  Applied Turfgrass Science doi:10.1094/ATS-2006-0330-01.RS.
  

• Carson, T.D., B.P. Horgan and D.W. White.  2005.  Mowing influence on the competitive ability of wild Poa annua versus a Poa annua var. reptans variety.  International Turfgrass Research Journal.  10:363-367.
  

• Rosen, C.J. and B.P. Horgan.  2005.  Regulation of phosphorus fertilizer application to turf in Minnesota: Historical perspective and opportunities for research and education.  International Turfgrass Research Journal. 10:130-135.
  

• Carson, T.D., B.P. Horgan and D.B.White.  2004.  Selective control of bentgrass in ‘True Putt’ creeping bluegrass.  J. Environ. Hort.  22(4):213-216.
  

• Engelsjord, M.E., B.E. Branham and B.P. Horgan.  2004.  The fate of 15N ammonium sulfate applied to Kentucky bluegrass and perennial ryegrass turfs.  Crop Sci.  44:1341-1347.
  

• Mulvaney, R.L., S.A. Yaremych, S.A. Khan, J.M Swiader, and B.P. Horgan.  2004.  Use of diffusion to determine soil cation-exchange capacity by ammonium saturation.  Comm. in Soil Sci. and Plant Analysis.   35(1&2):51-67.
  

• Horgan, B.P., P. Bierman, and C.J. Rosen.  2003.  Phosphorus fertilizer training program for golf course personnel.  Online.  J. of Extension.  http://www.joe.org/joe/2003october/tt6.shtml.
  

• Horgan, B.P., B.E. Branham, and R.L. Mulvaney.  2002.  Direct measurement of denitrificfation using 15N-labeled fertilizer applied to turfgrass.  Crop Sci.  42:1602-1610.
  

• Horgan, B.P., B.E. Branham, and R.L. Mulvany.  2002.  Mass balance of 15N applied to Kentucky bluegrass including direct measurement of denitrification.  Crop Sci.  42:1595-1601.
  

• Horgan, B.P. and F.H. Yelverton.  2001.  Removal of perennial ryegrass from overseeded bermudagrass using cultural methods.   Crop Sci.  41:118-126.
  

• Horgan, B.P., R.L. Mulvaney, and B.E. Branham.  2001.  Determination of atmospheric volume for direct field measurement of denitrification in soil cores.  Soil Sci. Soc. Am. J. 65:511-516.
  

• Khan, S.A., R.L. Mulvaney, K. Strle, and B.P. Horgan.  2000.  Evaluation of diffusion for inorganic-N analysis of natural water and wastewater.  J. Environ. Qual.  29:1890-1895.