Larson, W. E. and F. J. Pierce. 1993. The dynamics of soil quality as a measure of sustainability. Proceedings of a Symposium on Soil Quality, ASA annual meeting, November 1-6, 1992, Minneapolis, MN. (in press).
Montgomery, D.C. 1985. Introduction to Statistical Quality Control. John Wiley and Sons, New York. 520p.
Nix, H. A. 1968. The assessment of biological productivity. In G. A. Stewart (ed). Land Evaluation. The MacMillan Company of Australia, Melbourne. pp. 77-87.
Olson, G. W. 1974. Land Classifications. SEARCH Agriculture Vol 4, No.7. Cornell University Agricultural Experiment Station, Ithaca, N.Y. 33pp.
Pierce, F. J. 1991. Erosion productivity impact prediction. p. 35-52. In R. Lal and F. J. Pierce (eds.) Soil Management for Sustainability. Soil and Water Conserv. Sot., Ankeny, IA 50021.
Pierce, F. J. and R. Lal. 1991. Soil management in the 21st century. 175-179. In R. Lal and F. J. Pierce (eds.) Soil Management for Sustainability. Soil and Water Conserv. Soc., Ankeny, IA 50021.
Pierce, F. J. and W. E. Larson. 1993. Developing threshold values, indicators, and criteria to evaluate sustainable land management. pp. 7-14. In J. M. Kimble (ed) Proceedings of the Eighth International Soil Management Workshop, Utilization of Soil Survey Information for Sustainable Land Use-May, 1993. USDA, Soil Conservation Service, National Soil Survey Center.
Pierce, F. J., W. E. Larson, R. H. Dowdy, and W. A. P. Graham. 1983. Productivity of soils: Assessing long-term changes due to erosion. J. Soil Water Conserv. 38:39-44.
Pierce, F. J., W. E. Larson, R. H. Dowdy, and W. A. P. Graham. 1984. Soil productivity in the Corn Belt: An assessment of erosion's long-term effects. J. Soil Water Conserv. 39:131-136.
Riquier, J. 1974. A survey of parametric methods of soil and land evaluation. In Approaches to Land Classification. Soils Bulletin 22. Food and Agricultural Organization, Rome, Italy. pp. 47-53.
Robert, P. C., R. H. Rust, and W. E. Larson (eds). 1993. Proceedings of soil specific crop management: a workshop on research and development issues: April 14-16, 1992, Sheraton Airport Inn, Minneapolis, MN. Am. Soc. Agron, Inc., Madison, WI.
Ryan, T. P. 1989. Statistical Methods for Quality Control. John Wiley and Sons, New York. 446p.
Soil Survey Staff. 1951. Soil Survey Manual. Agr. Handbk. No. 18. U. S. Dept. Agr., Washington, D.C.
Schepers, J. S., K. D. Frank, and C. Bourg. 1986. Effect of yield goal and residual soil nitrogen considerations on nitrogen fertilizer recommendations for irrigated maize in Nebraska. J. Fert. Issues 3:133-139.
Stewart. G. A. (ed.). 1968. Land Evaluation. The MacMillan Company of Australia, Melbourne.
Wagenet, R. J., J. Bouma, and R. B. Grossman. 1991. Minimum data sets for use of soil survey information in soil interpretive models. pp. 161-182. In M. J. Mausbach and L. P. Wilding (eds) Spatial Variabilities of Soils and Landforms. SSSA Spec. Publ. Number 28. Soil Sci. Soc. Am., Inc., Madison, WI 53711.