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Robertson, G.P. ;Paul, E.A.  Howarth, R.W. 2000. “Decomposition and soil organic matter dynamics” : 104-116.
Robertson, G.P. ;Paul, E.A. ;Harwood, R.R. 2000. “Greenhouse gases in intensive agriculture: Contributions of individual gases to the radiative forcing of the atmosphere” 289: 1922-1925.
Robertson, G.P. ;Harwood, R.R.  Levin, S. A. 2001. “Sustainable agriculture” I: 99-108.
Roda, A. 1996. “Effects of growing alfalfa with perennial grasses upon potato leafhopper Homoptera Cicadellidae and alfalfa weevils Coleoptera Curculionidae”
Rosek, M. 1994. “Spatial and temporal soil water content changes within a sloping landscape”
Russell, C.A. ;Kosola, K.R. ;Paul, E.A. ;Robertson, G.P. 2004. “Nitrogen cycling in poplar stands defoliated by insects” 68: 365-381.
Sanchez, J.E. 2000. “Managing cropping systems to enhance the active soil nitrogen pool and control its mineralization”
Sanchez, J.E. ;Paul, E.A. ;Willson, T.C. ;Smeenk, J. ;Harwood, R.R. 2002. “Corn root effects on the nitrogen-supplying capacity of a conditioned soil” 94: 391-396.
Sanchez, J.E. ;Willson, T.C. ;Kizilkaya, K. ;Parker, E. 2001. “Enhancing the mineralizable nitrogen pool through substrate diversity in long-term cropping systems” 65: 1442-1447.
Paustian, K. ;Levine, E. ;Post, W.M. ;Ryzhova, I.M.  Swift, M.J. 1997. “The use of models to integrate information and understanding of soil C at the regional scale” 79: 227-260.
Petersen, S.O. ;Klug, M.J. 1994. “Effects of sieving, storage and incubation temperature on the phospholipid fatty acid profile of a soil microbial community” 60 (7): 2421-2430.
Peterson, B.J. ;Wollheim, W.M. ;Mullholland, P.J. ;Webster, J.R. ;Meyer, J.L. ;Tank, J.L. ;Marti, E. ;Bowden, W.B. ;Valett, H.M. ;Hershey, A.E. ;McDowell, W.B. ;Dodds, W.K. ;Hamilton, S.K. ;Gregory, S. ;Morrall, D.D. 2001. “Control of nitrogen export from watersheds by headwater streams” 292: 86-90.
Phillips, C.J. ;Harris, D. ;Dollhopf, S.L. ;Gross, K.L. ;Prosser, J.I. ;Paul, E.A. 2000. “Effects of agronomic treatments on the structure and function of ammonia oxidizing communities” 66: 5410-5418.
Pietola, L.M. ;Smucker, A.J.M. 1995. “Fine root dynamics of alfalfa after multiple cuttings and during a late invasion by weeds” 87 (6): 1161-1169.
Probyn, L. K. ;Cavigelli, M. A. ;Mutch, D. R. 2000. “Michigan Field Crop Pest Ecology and Management” : 102.
Raikow, D.F. ;Hamilton, S.K. 2001. “Bivalve diets in a midwestern U.S. stream: a stable isotope enrichment study” 46: 514-522.
Rasmussen, P.E. ;Collins, H.P. ;Smiley, R.W. 1989. “Long-Term Management Effects on Soil Productivity and Crop Yield in Semi-Arid Regions of Eastern Oregon”
Rasse, D.P. 1997. “Alfalfa and corn root modifications of soil nitrogen flux and retention.” : 147.
Rasse, D.P. ;Smucker, A.J.M. 1998. “Root recolonization of pervious root channels in corn and alfalfa rotations” 204: 203-212.
Rasse, D.P. ;Smucker, A.J.M. 1999. “Tillage effects on soil nitrogen and plant biomass in a corn-alfalfa rotation” 28: 873-880.