Research Statement

My focus in the Nutrient Management Spear Program has been on improving the economic and environmental sustainability of agriculture, specifically dairy farms, through the New York Phosphorus Index (NYPI) which is a tool for improving water quality through better manure management. I’m also currently working on whole-farm nutrient mass balances which allow farmers to identify inefficiencies in their practices and where opportunities for improvement may lie. From my Cornell experience I’ve also been exposed to precision agriculture, double cropping, P based management of corn-alfalfa rotations, acid-whey applications to soil, and greenhouse gas emissions from alfalfa.

Education

• 2009 - 2013, Ph.D. Soil Quality, Wageningen University, The Netherlands
  Biophysical soil quality of tillage systems under conventional and organic farming.
• 2002 - 2005, M.Sc. Soil Science, University of Guelph, Canada
  Effect of Manure Management Practice on E. coli, Nitrogen, and Phosphorous Loss in Agricultural Water.
• 1998 - 2002, B.Sc. (Honours) Environmental Science, University of Guelph, Canada
  Earth and Atmosphere Science Major. Area of emphasis in Environmental Impact Assessment.

Awards/Honors

• Cornell Postdoc Travel Grant
  To attend ASA, CSSA, and SSSA meetings in Phoenix, USA (2016)
• SUSTAIN: Soil Functional Biodiversity and Ecosystem Services, a Transdisciplinary Approach
  Participated in proposal writing, execution and dissemination.
  http://snowmannetwork.com/?page_id=283.
• COST Short-term Scientific Mission
  Influence of cover crops on soil properties in vineyards and olive groves, Madrid, Spain (2014).
• Young Professionals International
  Funding was through the Canadian Federation of Agriculture to work at the Global Forum on Agricultural Research, housed at the Food and Agriculture Organization of the United Nations in Rome, Italy   ( 2005  - 2006) .
• Morwick Scholarship
  School of Environmental Sciences, University of Guelph, Canada (2004).
• Taffy Davison Travel Award
  Ontario Agricultural College, University of Guelph, Canada (2003).

Publications

• Soil phosphorus saturation ratio sets comparable manure application cutoffs across states differing in agronomic soil test
  S.J. Crittenden, Q.M. Ketterings, J. Knight, and K. Czymmek (2017). Soil Sci. 182 : 36-44.
• Restructuring the P Index to better address P management in New York
  Q.M. Ketterings, S. Cela, A. Collick, S.J. Crittenden, and K. Czymmek (2017). J. of Env. Qual. DOI: 10.2134/jeq2013.02.0067
• Integrating soil physical and biological properties in contrasting tillage systems in organic and conventional farming
  S.J. Crittenden and R. de Goede (2016). Europ. J. Soil Biol. 77:26-33.
• Sustainable Land Management Practices for Dryland Restoration. A Review.
  Maria Jose Marques, Gudrun Schwilch, Stephen Crittenden, Nina Laute- burg,  Tesfai Mehreteab,  Jannes Stolte,  Eshetu Yirdaw,  Nikia Evelpidou, Thorunn  Petusdottir,  Thomas  Panagopoulos,  Annab  Karkani,  Yaseman AsliYilmazqi,  Jose  Luis  Rubio,  Claudio  Zucca,  Ute  Schmiedel,  Markku Kanninen,  Adrian Doko (2016).   Journal of Environmental Planning and Management. Sustainability 8 (177). http://doi.org/10.3390/su8020177
• Effect of tillage on earthworms over short- and medium-term in conventional and organic farming
  Crittenden, S. J., Eswaramurthy, T., de Goede, R. G., Brussaard, L., and Pulleman, M. M. (2014). Applied Soil Ecology  83: 140-148.
• Earthworm assemblages as affected by field margin strips and tillage intensity: An on-farm approach
  S.J. Crittenden, E. Huerta, R.G.M. de Goede, M.M. Pulleman (2015). European Journal of Soil Biology  66: 49-56.
• Soil physical quality of reduced tillage systems in conventional and organic farming
  S.J.  Crittenden, N.  Poot, M. Heinen, M.M. Pulleman (2015).  Soil & Tillage Research 154:136-144.