- Andrews, S.S., Mitchell J.P., Mancinelli R., Karlen K.L., Hartz T.K., Horwath W.R., Pettygrove G.S., Scow K.M. and D.S. Munk .2002. On-farm assessment of soil quality in California's central valley. Agronomy journal. 94:12–23.
- Aparicio, V., and J.L. Costa. 2007. Soil quality indicators under continuous cropping systems in the Argentinean pampas. Soil and Tillage Research. 96:155–165.
- Brejda, J.J., Moorman, T.B., Karlen, D.L., and T.H. Dao. 2000. Identification of regional soil quality factors and indicators: I. Central and Southern High Plains. Soil Science Society of American Journal. 64:2115–2124.
- Dexter, A. R. 2004. Soil physical quality. Part I. Theory, effects of soil texture, density, and organic matter, and effect on root growth. Geoderma.120:201- 214.
- Doran, J.W. and B.T. Parkin. 1994. Defining and assessing soil quality. In: Doran, J.W., and et al (Eds.), Defining Soil Quality for a Sustainable Environment. Soil Science Society of America, Inc., Madison, WI, USA, pp. 3–21. Special Publication. Number 35.
- Doran, J.W., and A.J. Jones. Quantitative indicators of soil quality: a minimum data set .1996. pp. 2-25. In: Doran, J.W., and A.J. Jones. (Eds) Methods for Assessing Soil Quality. Soil Science Society of America Special Publication, vol. 49. Soil Science Society of America,Inc., Madison, WI, USA.
- Dumanski, J., and C. Pieri. 2000. Land quality indicators: research plan. Agriculture Ecosystem and Environment. 81:93-102.
- Gee, G.W., and J.M. Bauder. 1986. Partical-size analysis. Pp 383-411. In: Page, A. L., and et al (Eds), Methods of Soil Analysis, Part 1, Physical and Mineralogical Methods. Agronomy Monogroph No. 9 (2nd edition), American Society of Agronomy, Madison, WI.
- Gomez, A.A., Kelly, D.E.S., Syers, J.K., and K.J. Coughlan. 1996. Measuring sustainability of agricultural systems at the farm level. Pp. 401–410. In: Doran JW and Jones AJ(Eds). Methods for Assessing Soil Quality. Soil Science Society of America, Inc. Madison, WI.
- Govaerts, B., Sayre K.D., and J. Deckers. 2006. A minimum data set for soil quality assessment of wheat and maize cropping in the highlands of Mexico. Soil and Tillage Research. 87:163–174.
- Han, W.J., and Q.T. Wu. 1994. A primary approach on the quantitative assessment of soil quality. Chinese Journal of Soil Science. 25:245–247.
- Jena, A., and K. Gupta. 2002. Determination of pore volume and pore distribution by liquid extrusion porosimetry without using mercury. Ceramic Engineering and Science Proceedings. 23: 277–284.
- Karlen, D.L., Andrews, S.S., and J.W. Doran. 2001. Soil quality: current concepts and applications. Advances in Agronomy. 74:1 – 39.
- Karlen, D.L., Wollenhaupt, N.C., Erbach, D.C., Berry, E.C., Swan, J.B., Eash, N.S., and J.L. Jordahl. 1994. Crop residue effects on soil quality following 10-years of no-till corn. Soil and Tillage Research. 31:149-167.
- Kemper, W.D., and R.C. Rosenau. 1986. Aggregate stability and size distribution. Pp425–442. In: Klute A (ed). Methods of Soil Analysis. Part a: Physical and Mineralogical Methods. American Society of Agronomy. Soil Science Society of America. Madison, WI.
- Lal, R. 1994. Methods and guidelines for assessing sustainable use of soil and water resources in the tropics. Soil Management Support System, USDA-NRCS, Washington, DC. pp:1-88.
- Mausbach, MJ., and A. Seybold. 1998. Assessment of soil quality. Pp. 33–43. In: Lal R (Ed) Soil quality and agricultural sustainability. Ann Arbor Press, Chelsea, MI.
- Page, A. L., Miller R. H., and D. R. Keeney. 1982. Methods of Soil Analysis, part2, chemical and microbiological properties. American Society of Agronomy,Inc. Soil Science Society of America. Madison, WI.
- Qi, Y., Jeremy, L., Darilek., Biao Huang., Yongcun Zhao., Weixia Sun., and Zhiquan Gu. 2009. Evaluating soil quality indices in an agricultural region of Jiangsu Province, China. Geoderma. 149:325-334.
- Qin, M.Z., and J. Zhao. 2000. Strategies for sustainable use and characteristics of soil quality changes in urban-rural marginal area: a case study of Kaifeng. Acta Geogr. Sin. 55:545–554.
- Reynolds, W.D., Drury C.F., Tan C.S., Fox A. and X.M. Yang. 2009. Use of indicators and pore volume-function characteristics to quantify soil physical quality. Geoderma. 152:252-263.
- SAS Institute Inc. 2000. JMP Design of Experiments, Version 4. Cary, NC, USA
- SAS Institute. 1989. SAS Design of Experiments, Version 9.1. Cary, NC, USA.
- Shukla, M K., Lal, R., and M. Ebinger. 2004. Soil quality indicators for the North Appalachian experimental watersheds in Coshocton, Ohio. Soil Science. 169:195–205.
- Shukla, M.K., Lal R. and M. Ebinger. 2006. Determining soil quality indicators by factor analysis. Soil and Tillage Research. 87:194–204.
- Singh, J., and K.L. Khera. 2009. Physical indicators of soil quality in relation to soil erodibility under different land uses. Arid Land Research and Management. 23:152-167.
- Sun, B., Zhou, S.L., and Q.G. Zhao. 2003. Evaluation of spatial and temporal changes of soil quality based on geostatistical analysis in the hill region of subtropical China. Geoderma. 115:85–99.
- Torbert, H.A., Krueger, E., and D. Kurtene. Soil quality assessment using fuzzy modeling. International Agrophysics. 22:365-370.
- Walkley, A., and A. Black. 1934. An examination of Degtjareff method for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Science. 37:29-37.
- Wallace, A., and R.E. Terry. 1998. Soil conditioners, soil quality and soil sustainability. Marcel Dekker, New York. pp:1-41
- Wischmeier, W.H. and J.R. Mannering. 1969. Relation of soil properties to its erodibility. Soil Science Society of American Journal. 33:131–137.
|