Appendix 1 - Literature Cited Cochran, V., L. Elliott and R. Papendick. 1980. Carbon and nitrogen movement from surfaceapplied wheat (Triticum aestivum) straw. Soil Science Society of America Journal 44: 978-982. Crum, J. and H. Collins. 1995. KBS soils. http://lter.kbs.msu.edu/research/site-description-andmaps/soil-description/ Accessed 20 February 2015. GLEXPO (Great Lakes Fruit, Vegetable, and Farm Market Expo). 2015. http://www.glexpo.com/ Accessed 20 February 2015. Gomes, J., C. Bayer, F. de Souza Costa, M. de Cássia Piccolo, J.A. Zanatta, and F.C.B. Vieira 2009. Soil nitrous oxide emissions in long-term cover crops-based rotations under subtropical climate. Soil and Tillage Research 106: 36-44. Graham, C. 2010. Balancing nitrogen sinks and sources using cover crops on manured fields. SARE Graduate Student Project # GNE10-005. http://mysare.sare.org/mySARE/ProjectReport.aspx?do=viewProj&pn=GNE10-005 Accessed 11 May 2013. Grubinger, V. 2005. Climate change and agriculture: Preparing educators to promote practical and profitable responses. SARE Professional Development Grant # ENE05-091. http://mysare.sare.org/mySARE/ProjectReport.aspx?do=viewProj&pn=ENE05-091 Accessed 11 May 2013. Haramoto, E. 2012. Improving resource use efficiency through strip tillage, cover cropping, and deep fertilizer placement. SARE Graduate Student Project # GNC12-158. http://mysare.sare.org/mySARE/ProjectReport.aspx?do=viewProj&pn=GNC12-158 Accessed 11 May 2013. Holland, E.A., Robertson, G.P., Greenberg, J., Groffman, P.M., Boone, R.D., and J.R. Gosz. 1999. Soil CO2, N2O, and CH4 exchange. In: Standard Soil Methods for Long-Term Ecological Research. (eds Robertson, G.P., Bledsoe C.S., Coleman, D.C., and P. Sollins) pp.185-201. Oxford, UK, Oxford University Press. Kahmark, K. and N. Millar. 2008. KBS LTER Protocols: CH4, N2O, CO2 Fluxes (bucket method). http://lter.kbs.msu.edu/protocols/113, Accessed 1 February 2015. Kuo, S. and E.J. Jellum. 2002. Influence of winter cover crop and residue management on soil nitrogen availability and corn. Agronomy Journal 94: 501-508. McSwiney, C.P. and G.P. Robertson. 2005. Nonlinear response of N2O flux to incremental fertilizer addition in a continuous maize (Zea mays L.) cropping system. Global Change Biology 11: 1712-1719. Novoa, R. S., and H.R. Tejeda (2006) Evaluation of the N2O emissions from N in plant residues as affected by environmental and management factors. Nutrient Cycling in Agroecosystems 75: 29-46. Parkin, T.B. and T.C. Kaspar. 2006. Nitrous oxide emissions from corn–soybean systems in the Midwest. Journal of Environmental Quality 35: 1496-1506. Ribaudo, M., Delgado, J., Hansen, L., Livingston, M., Mosheim, R., and J. Williamson. 2011. Nitrogen in agricultural systems: implications for conservation policy. ERR-127. USDAERS. Robertson, G.P., Bledsoe, C.S., Coleman, D.C., and P. Sollins. 1999. Standard Soil Methods for Long-Term Ecological Research. Oxford, UK, Oxford University Press. Robertson, G.P. and P. Vitousek. 2009. Nitrogen in agriculture: Balancing the cost of an essential resource. Annual Review of Environment and Resources 34: 97-125. Saxton, A.M. 1998. A macro for converting mean separation output to letter groupings in Proc Mixed. Proceedings of the 23rd SAS Users Group International, SAS Institute, Cary, NC: 1243-1246. Snapp, S., Swinton, S., Labarta, R., Mutch, D., Black, J., Leep, R., Nyiraneza, J., and K. O’Neil. 2005. Evaluating benefits and costs of cover crops for cropping system niches. Agronomy Journal 97: 322-332. USDA-NRCS. 2015. Estimating moist bulk density by texture. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/office/ssr10/tr/?cid=nrcs144 p2_074844 Accessed 20 February 2015.