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Inouye, R.S. 1998. “Species-area curves and estimates of total species richness in an old field chronosequence. Plant Ecology 137: 31-40.”
Jarrell, W.M., D.E. Armstrong, D.F. Grigal, E.F. Kelly, H.C. Monger, D.A. Wedin.  G. P. Robertson, C. S. Bledsoe, D. C. Coleman and P. Sollins 1999. “Soil water and temperature status” : 55-73.
Johnson, N.C. 1991. “Plant and soil regulation of mycorrhizae in natural and agricultural ecosystems. Ph.D. Thesis, University of Minnesota.”
Johnson, N.C., D.R. Zak, D. Tilman and F.L. Pfleger. 1991. “Dynamics of vesicular-arbuscular mycorrhizae during old field succession. Oecologia 86:349-358.”
Johnson, N. C., F. L. Pfleger, R. K. Crookston, S. R. Simmons and P. J. Copeland. 1991. “Vesicular-arbuscular mycorrhizas respond to corn and soybean cropping history. New Phytologist 117:657-663.”
Johnson, N.C. and F.L. Pfleger. 1992. “Vesicular-Arbuscular mycorrhizae and cultural stresses. Pages 71-99 in Bethlenfalvay, G., et al., eds., VA Mycorrhizae in Sustainable Agriculture. ASA/SSSA special publication No. 54. American Society of Agronomy, Madison, WI.”
Johnson, N.C., D. Tilman and D. Wedin. 1992. “Plant and soil controls on mycorrhizal fungal communities. Ecology 73(6):2034-2042.”
Johnson, N.C., P.J. Copeland, R.K. Crookston and F.L. Pfleger. 1992. “Mycorrhizae: possible explanation for yield decline with continuous corn and soybean. Agronomy Journal 84:387-390.”
Johnson, N.C. 1993. “Can fertilization of soil select less mutualistic mycorrhize? Ecological Applications 3(4):749-757.”
Johnson, N.C. and D.A. Wedin. 1997. “Soil carbon, nutrients, and mycorrhizae during conversion of dry tropical forest to grassland. Ecological Applications 7:171-182.”
Johnston, M.H., P.S. Homann, J.K. Engstrom and D.F. Grigal. 1996. “Changes in ecosystem carbon storage over 40 years on an old-field/forest landscape in east-central Minnesota. Forest Ecology and Management 83:17-26.”
Kephart, K., C. West and D.A. Wedin. 1995. “Grassland ecosystems and their improvement. Pages 141-153 in R. F. Barnes, D. A. Miller and C. J. Nelson, Eds., Forages: Volume 1: An Introduction to Grassland Agriculture. Iowa State University Press.”
Kitajima, K. and D. Tilman. 1996. “Seed banks and seedling establishment on an experimental productivity gradient. Oikos 76:381-391.”
Knops, J. and Lehman, C. L. 1998. “Modeling range expansions in biological invasions. Review of Shigesada, N. and Kawasaki, K., Biological invasions: theory and practice. Oxford University Press, New York, 205 pp. Ecology 79:2587”
Knops, J.M.H., D. Tilman, N.M. Haddad, S. Naeem, C.E. Mitchell, J. Haarstad, M.E. Ritchie, K.M. Howe, P.B. Reich, E. Siemann, and J. Groth. 1999. “Effects of plant species richness on invasion, dynamics, disease outbreaks, insect abundances and diversity. Ecological Letters 2:286-293.”
Knops, J. M. H. and K. Reinhart. 2000. “Specific leaf area along a nitrogen fertilization gradient. Am. Midl. Nat. 144:265-272.”
Knops, J., Ritchie, M.E., Tilman, D. 2000. “Selective herbivory on a nitrogen fixing legume (Lathyrus venosus) influences productivity and ecosystem nitrogen pools in an oak savanna. Ecoscience 7(2):166-174.”
Knops, J.M.H. and D. Tilman. 2000. “Dynamics of soil nitrogen and carbon accumulation for 61 years after agricultural abandonment. Ecology 81:88-98.”
Larson, J.L. and E. Siemann. 1998. “Legumes may be symbiont-limited during old-field succession. American Midland Naturalist 140:90-95.”
Lawson, D., R.S. Inouye, N. Huntly, and W.P. Carson. 1999. “Patterns of woody plant abundance, recruitment, mortality and growth in a 65 year chronosequence of old-fields. Plant Ecology 45:267-279.”