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Karl Czymmek

Karl Czymmek

Senior Extension Associate, PRODAIRY

Field Crops and Nutrient Management
328 Morrison Hall, Ithaca, NY 14853
Phone: 607-255-4890

Complete CV for Karl


    • State University of New York, Buffalo, NY
    • Juris Doctor, June 1993
    • Concentration in Taxation
    • Admitted to New York State Bar, 1994
    • B.S., Agriculture, June 1986
    • A.A.S., Agriculture, June 1982


  • Certified Crop Advisor
  • USDA Certificate of Appreciation: CREP, November 2000
  • Co-recipient USDA “flying vee” award, 2000
  • Empire Chapter SWCS Commendation Award, 2002
  • USDA-NRCS NY “Partner of the year” 2003
  • PRO-DAIRY team Outstanding Accomplishments in Extension Award co-recipient 2010

Publications (8 years)


  • Ros, M.B.H., Q.M. Ketterings, S. Cela., and K.J. Czymmek (2019). Evaluating management implications of the New York Phosphorus Index with farm field information. Journal of Environmental Quality (in press).
  • Lyons, S.E., Q.M. Ketterings, S. Ort, G.S. Godwin, S.N. Swink, K.J. Czymmek, D.J. Cherney, J.H. Cherney, J.J. Meisinger, and T.F. Kilcer (2019). Nitrogen management for forage winter cereals in the Northeastern USA. Soil Science Society of America Journal (in press).
  • Kharel, T.P., S.N. Swink, A. Maresma, C. Youngerman, D. Kharel, K.J. Czymmek, and Q.M. Ketterings (2019). Yield monitor data cleaning is essential for accurate corn grain/silage yield determination. Agronomy Journal 111: 509-516. doi:10.2134/agronj2018.05.0317.


  • Lyons, S.E., Q.M. Ketterings, G. Godwin, J.H. Cherney, K.J. Czymmek, and T. Kilcer (2018). Spring N management is important for triticale forage yield and quality. Agronomy Journal 110:1–8. doi:10.2134/agronj2018.01.0041.


  • Sadeghpour, A., Q.M. Ketterings, G. Godwin, and K.J. Czymmek (2017). Shifting from N-based to P-based manure management maintains soil test phosphorus dynamics in a long-term corn and alfalfa rotation. Agronomy for Sustainable Development. doi: 10.1007/s13593-017-0416-z.
  • Ketterings, Q.M., S. Cela, A. Collick, S. Crittenden, and K.J. Czymmek (2017). Restructuring the P index to better address P management in New York. Journal of Environmental Quality. doi:10.2134/jeq2016.05.0185.
  • Crittenden, S., Q.M. Ketterings, and K.J. Czymmek (2017). Soil phosphorus saturation ratio sets comparable manure application cutoffs across states differing in agronomic soil test. Soil Science 182:00-00. doi: 10.1097/SS.0000000000000192.
  • Cela, S., Q.M. Ketterings, M., Soberon, C. Rasmussen, and K.J. Czymmek (2017). Upper Susquehanna watershed and New York State improvements in nitrogen and phosphorus mass balances of dairy farms. Journal of Soil and Water Conservation 27: 1-11. doi: 10.2489/jswc.72.1.1.
  • Sadeghpour, A., Q.M. Ketterings, G.S. Godwin, and K.J. Czymmek (2017). Under- or over-application of nitrogen impact corn yield, quality, soil, and environment. Agronomy Journal 109:1-11. doi: 10.2134/agronj2016.06.035.


  • Sadeghpour*, A., Q.M. Ketterings, F. Vermeylen, G.S. Godwin*, and K.J. Czymmek (2016). Soil properties under nitrogen- vs phosphorus-based manure and compost management of corn. Soil Science Society of America Journal 80:1272–1282. doi:10.2136/sssaj2016.03.0086. 
  • Cela*, S., Q.M. Ketterings, K.J. Czymmek, J.L. Weld, D.B. Beegle, and P.J.A. Kleinman (2016). Nutrient management planners' feedback on New York and Pennsylvania phosphorus indices. Journal of Soil and Water Conservation 71: 281-288. DOI: 10.2489/jswc.71.4.281.
  • Sadeghpour*, A., Q.M. Ketterings, G. Godwin* and K.J. Czymmek (2016). Nitrogen- vs phosphorus-based manure and compost management of corn. Agronomy Journal 108: 185-195. DOI:10.2134/agronj2015.0218.


  • Cela*, S., Q.M. Ketterings, K.J. Czymmek, M. Soberon*, and C.N. Rasmussen* (2015). Long-term trends of nitrogen and phosphorus mass balances on New York dairy farms. Journal of Dairy Science 98: 7052-7070.
  • Soberon*, M., S. Cela*, Q.M. Ketterings, K.J. Czymmek, and C.N. Rasmussen* (2015). Changes in nutrient mass balances over time and related drivers for 54 New York dairy farms (2015). Journal of Dairy Science 98: 5313–5329.
  • Ketterings Q.M., S.N. Swink*, S.W. Duiker, K.J. Czymmek, D.B. Beegle, and W.J. Cox (2015). Review and interpretation: integrating cover crops for N management in corn systems on northeastern dairies. Agronomy Journal 107: 1365-1376.
  • Ketterings, Q.M., S. Ort*, S.N. Swink*, G. Godwin*, T. Kilcer, J. Miller, W. Verbeten, and K.J. Czymmek (2015). Winter cereals as double crops in corn rotations on New York dairy farms. Journal of Agricultural Science DOI: 10.5539/jas.v7n2p18.


  • Cela*, S., Q.M. Ketterings, K.J. Czymmek, M. Soberon*, and C.N. Rasmussen* (2014). Characterization of N, P, and K mass balances of dairy farms in New York State. Journal of Dairy Science 97:7614–7632.


  • Ketterings, Q.M, G.S. Godwin*, S.N. Swink*, and K.J. Czymmek (2013). Can manure replace the need for starter nitrogen fertilizer? Agronomy Journal 105:1597–1605.
  • Long, E., Q.M. Ketterings and K.J. Czymmek (2013). Survey of cover crop use on New York dairy farms. Crop Management. DOI:10.1094/CM-2013-0019-RS.
  • Soberon*, M.A., Q.M. Ketterings, C.N. Rasmussen*, and K.J. Czymmek (2013). Whole farm nutrient balance calculator for New York dairy farms. Journal of Natural Resources and Life Science Education (renamed Natural Sciences Education) 42: 57-67.
  • Ketterings, Q.M., G. Godwin*, P. Barney, J.R. Lawrence*, B. Aldrich, T. Kilcer, K.J. Czymmek, and B. Gloy (2013). Shallow mixing of surface soil and liquid dairy manure conserves nitrogen while retaining surface residue. Agronomy for Sustainable Development. 33: 507-517. DOI 10.1007/s13593-013-0141-1.


  • Ketterings, Q.M., J. Knight*, P. Ristow*, G. Swanepoel*, and K.J. Czymmek (2012). Evaluation of dairy and cash grain farmers’ perceptions of the value of manure. Crop Management. doi:10.1094/CM-2012-1024-01-RS.
  • Ketterings, Q.M., K.J. Czymmek, D.B. Beegle, L.E. Chase, and C.N. Rasmussen* (2012). Systematic nutrient (im)balances in dairy farm systems of the Northeast and Mid-Atlantic Regions of the United States. Journal of Agricultural Science. doi:10.5539/jas.v4n11p.
  • Ketterings, Q.M., and K.J. Czymmek (2012). Phosphorus index as a phosphorus awareness tool: documented phosphorus use reduction in New York State. Journal of Environmental Quality. 41(6): 1767-1773 (doi:10.2135/jeq2012.0050).
  • Kleinman, P, K. Saacke Blunk, R. Bryant, L. Saporito, D. Beegle, K. Czymmek, Q.M. Ketterings, T. Sims, J. Shortle, J. McGrath, F. Coale, M. Dubin, D. Dostie, R. Maguire, R. Meinen, A. Allen, K. O’Neill, L. Garber, M. Davis, B. Clark, K. Sellner, and M. Smith (2012). Managing manure for sustainable livestock production in the Chesapeake Bay Watershed. Journal of Soil and Water Conservation. 67(2): 54-61. (doi:10.2489/jswc.67.2.54A).

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