1- Andrews S.S., Flora C.B., Mitchell J.P., and Karlen D.L. 2003. Growers perceptions and acceptance of soil quality indices. Geoderma, 114:187-213.
2- Andrews S.S., Mitchell J.P., Mancinelli R., Karlen K.L., Hartz T.K., Horwath W.R., Pettygrove G.S., Scow K.M., and Munk D.S. 2002. On-farm assessment of soil quality inCalifornia's central valley. Agronomy Journal, 94:12–23.
3- Aparicio V. Costa J. L. 2007. Soil quality indicators under continuous cropping systems in the Argentinean pampas. Soil and Tillage Research, 96:155–165.
4- Armenise E., Redmile-Gordon M.A., Stellacci A.M., Ciccarese A., and Rubino P. 2013. Developing a soil quality index to compare soil fitness for agricultural use under different managements in the Mediterranean environment. Soil and Tillage Research, 130:91-98.
5- Beinat E., and Nijkamp P. 1998. Multicriteria Analysis for Land-Use Management. Kluwer Academic Publishing, Boston.
6- Bindraban P.S., Stoorvogel J.J., Jansen D.M., Vlaming J., and Groot J.J.R. 2000. Land quality indicators for sustainable land management: proposed method for yield gap and soil nutrient balance. Agriculture, Ecosystems & Environment, 81:103–112.
7- Burrough P.A. 1989. Fuzzy mathematical methods for soil survey and land evaluation. European Journal of Soil Science, 40:477–492.
8- Dexter A. R. 2004. Soil physical quality: Part I. Theory, effects of soil texture, density, and organic matter, and effects on root growth. Geoderma. 120: 201–214.
9- Ditzler C.A., and Tugel A.J. 2002. Soil quality field tools of USDANRCS soil quality institute. Agronomy Journal 94:33–38.
10- Dobermann A., and Oberthur T. 1997. Fuzzy mapping of soil fertility — a case study onirrigated riceland in the Philippines. Geoderma, 77:317–339.
11- Doran J.W., Coleman D.C., Bezdicek D.F., and Stewart B.A. 1994. Defining soil quality for asustainable environment. SSSA Special Publication. 35. Soil Science Society ofAmerica, Madison, WI, USA.
12- Doran J.W., and Jones A.J. 1996. Methods for Assessing Soil Quality. Soil ScienceSociety of America Special Publication, vol. 49, Madison.
13- Doran J.W., and Parkin T.B. 1994. Defining and assessing soil quality. P. 3-21. In: Doran J.W., Coleman D.C., Bezdicek D.F., Stewart B.A. (Eds.), Defining Soil Quality for a Sustainable Environment. 35. ASA and SSSA, Madison, WI.
14- Dumanski J., and Pieri C. 2000. Land quality indicators: research plan. Agriculture, Ecosystems & Environment, 81:93–102.
15- Emami H., Neyshabouri M.R., and Shorafa M. 2012. Relationships between Some Soil Quality Indicators in Different Agricultural Soils from Varamin, Iran. Agriculture science and technology, 14:951-959.
16- FAO. 1996. Agro-ecological zoning guidelines. FAO Rome.
17- Fu B. 1991. Theory and practice of land evaluation. China Science and Technology Press, Beijing.
18- Glover J.D., Reganold J.P., and Andrews P.K. 2000. Systematic method for rating soil quality of conventional, organic, and integrated apple orchards in Washington State. Agriculture, Ecosystems and Environment, 80:29-45.
19- Govaerts B., Sayre K.D., and Deckers J. 2006. A minimum data set for soil quality assessmentof wheat and maize cropping in the highlands of Mexico. Soil &Tillage Research, 87:163–174.
20- Gullin Li., Chen J., Sun Z., and Tan M. 2007. Establishing a minimum dataset for soil quality assessment based on soil properties and land-use changes. Acta ecological sinica, 27: 2715-2724.
21- Han W.J., and Wu Q.T. 1994. A primary approach on the quantitative assessment of soilquality. Chinese Journal of Soil Science, 25:245–247. (In Chinese with English Abstract).
22- Herrick J. E., Brown J. R., Tugel A. J., Shaver P. L., and Havstad K. M. 2002. Application of soil quality to monitoring and management: paradigms from rangeland ecology. Agronomy Journal, 94:3–11.
23- Hillel D. 1991. Out of the Earth: Civilization and the Life of the Soil. University of California Press, Berkeley.
24- Imaz M.J., Virto I., Bescansa P., Enrique A., Fernandez-Ugalde O., and Karlen D.L. 2010. Soil quality indicator response to tillage and residue management on semi-arid Mediterranean cropland. Soil and Tillage Research, 107:17-25.
25- Karlen D.L., Gardner J.C., and Rosek M.J. 1998. A soil quality framework for evaluating theimpact of CRP. Journal of production agriculture, 11:56–60.
26- Karlen D.L., M.J. Mausbach J.W., Doran R.G., Cline R.F., Harris G.E., and Schuman. 1997. Soil quality: a concept, definition and framework for evaluation (a guest editorial). Soil Science Society of America Journal, 61:4-10.
27- Karlen D.L., and Scott D.E. 1994. A framework for evaluating physical and chemicalindicators of soil quality. P. 53-72. In: Doran J.W., Coleman D.C., Bezdicek D.F., Stewart B.A. (Eds.), Defining Soil Quality for a Sustainable Environment. ASA and SSSA, Madison,WI.
28- Karlen D.L., Tomer M.D., Neppel J., and Cambardella C.A. 2008. A preliminary watershed scale soil quality assessment in north central low a, USA. Soil and Tillage Research, 99:291-299.
29- Karlen D.l., Wollenhaupt N.C., Erbach D.C., Berry E.C., Swan J.B., Eash N.S., and Jordahl J.L. 1994. Long-term tillage effects on soil quality. Soil and Tillage Research 32:313-327.
30- Lal R. 1999. Soil quality and food security: the global perspective. P. 3-16. In: Lal, R. (Ed.), Soil Quality and Soil Erosion. CRC Press, Boca Raton.
31- Larson W.E., and Pierce F.J. 1994. The dynamics of soil quality as a measure of sustainablemanagement. Defining Soil Quality for a Sustainable Environment. Soil Science Society of America, Madison, Wisconsin.
32- Masto R.E., Chhonkar P.K., Singh D., and Patra A.K. 2008. Alternative soil quality indices for evaluating the effect of intensive cropping, fertilization and manuring for 31 years in the semi-arid soils of India. Environmental Monitoring and Assessment. 136:419-435.
33- McBratney A.B., and Odeh I.O.A. 1997. Application of fuzzy sets in soil science: fuzzy logic, fuzzy measurements and fuzzy decisions. Geoderma, 77:85–113.
34- Mohaghegh P., Naderi M., and Mohamadi. 2016. Determination of effective indicators for soil quality assessment in different land use typesof Chughakhor basin. Soil and Water Conservation Journal, 3:55-71. (In Persian with English abstract)
35- Monreal C.M., Dinel H., Schnitzer M., Gamble D.S., and Biederbeck V.O. 1998. Impact of carbon sequestration on functional indicators of soil quality as influenced by management in sustainable agriculture. P. 435-457. In: Lal R., Kimble J.M., Follett R.F., Stewart B.A. (Eds.), Soil Processes and the Carbon Cycle. CRC Press, Boca Raton.
36- National Research Council. 1993. Soil and Water Quality: an Agenda for Agriculture. National Academy Press, Washington, DC.
37- Nazzareno D., and Michele C. 2004. Multivariate indicator kriging approach using a GIS toclassify soil degradation for Mediterranean agricultural lands. Ecological Indicators, 3:177–187.
38- Pieri C., Dumanski J., Hamblin A., and Young A. 1995. Land Quality Indicators.World BankDiscussion Papers. Washington DC.
39- Qi Y., Darilek J., Huang B., Zhao Y., Sun W., and Gu Zh. 2009. Evaluating soil quality indices in an agricultural region of Jiangsu Province, China. Geoderma, 149:325–334.
40- Qin M.Z., and Zhao J. 2000. Strategies for sustainable use and characteristics of soil qualitychanges in urban-rural marginal area: a case study of Kaifeng. Acta Geographica Sinica-chinese edition, 55:545–554 (In Chinese with English abstract).
41- Rasouli M.H., Ghodrat K., Ashrafi S., Jafari M., and Khodaverdiloo H. 2016. Evaluation of soil quality indices in Northern Zagros Forests (case study:Oshnaviye-west Azirbaijan). Soil management and sustainable production. 3:83-89. (In Persian with English abstract)
42- Reeves D.W. 1997. The role of organic matter in maintaining soil quality in continuous cropping systems. Soil & Tillage Research, 43:131–167.
43- Reynolds W. D., Bowman B. T., Drury C. F., Tan C. S., and Lu X. 2002. Indicators of good soil physical quality: density and storage parameters. Geoderma, 110:131–146.
44- Reynolds W. D., Drury C. F., Tan C. S., Fox C. A., and Yang X. M. 2009. Use of indicators and pore volume-function characteristics to quantify soil physical quality. Geoderma, 152:252–263.
45- Rezaei S.A., Gilkes R.J., and Andrews S.S. 2006. A minimum data set for assessing soilquality in rangelands. Geoderma, 136:229–234.
46- Shahab H., Emami H., Haghnia G.H., and Karimi A. 2013. Pore size distribution as a soil physical quality index for agricultural and pasture soils in northeastern Iran. Pedosphere, 23:312-320.
47- Shukla M.K., Lal R., and Ebinger M. 2006. Determining soil quality indicators by factoranalysis. Soil & Tillage Research, 87:194–204.
48- Singer M.J., and Ewing S. 2000. Soil quality. In: Sumner, M.E. (Ed.), Handbook of SoilScience. CRC Press, Boca Raton, FL.
49- Singh M. J., and Khera K. L. 2009. Physical indicators of soil quality in relation to soil erodibility under different land uses. Arid land research and management, 23:152–167.
50- Smith J.L., Halvaorson J.J., and Papendick R.I. 1994. Using multiple-variable indicatorkriging for evaluating soil quality. Soil Science Society of America Journal, 57:743–749.
51- Stamatiadis S., Doran J.W., and Kettler T. 1999. Field and laboratory evaluation of soilquality changes resulting from injection of liquid sewage sludge. Applied Soil Ecology, 12:263–272.
52- Sun B., Zhou S.L., and Zhao Q.G. 2003. Evaluation of spatial and temporal changes of soilquality based on geostatistical analysis in the hill region of subtropical China. Geoderma, 115:85–99.
53- Tang X. 1997. Fuzzy comprehensive evaluation of the productivity of purple soil in SichuanProvince, China. The Advance in Soil Research, 28:107–109. (In Chinese with English abstract).
54- Topp G. C., Reynolds W. D., Cook F. J., Kirby J. M., and Carter M. R. 1997. Chapter 2: Physical attributes of soil quality. P. 21-58. In Gregorich E. G. and Carter M. R. (eds.) Soil Quality for Crop Production and Ecosystem Health. Elsevier, Amsterdam.
55- Van der Ploeg R.R., Böhm W., and Kirkham M.B. 1999. On the origin of the theory of mineralnutrition of plants and the law of the minimum. Soil Science Society of America Journal, 63:1055–1062.
56- Wander M.M., Walter G.L., Nissen T.M., Billero G.A., Andrews S.S., and Cavanaugh Grant D.A. 2002. Soil quality: science and process. Agronomy Journal, 94:23–32.
57- Wang X.J., and Gong Z.T. 1998. Assessment and analysis of soil quality changes after elevenyears of reclamation in subtropical China, Geoderma, 81:339–355.
58- Wienhold B.J., Pikul J., Liebig M.A., Mikha M.M., Varvel G.E., Doran J.W., and Andrews S.S. 2006. Cropping system effects on soil quality in the Great Plains: synthesis from a regional project. Renewable Agriculture and Food Systems, 21:49-59.
59- Yao R.J., Yang J.S., Zhao X.F., Li X.M., and Liu M.X. 2013. Dtermining minimum data set for soil quality assessment of typical salt-affected farmland in the coastal reclamation area. Soil and Tillage Research, 128:137-148.
60- Zhang B., Zhang Y., Chen D., White R.E., and Li Y. 2004. A quantitative evaluation system ofsoil productivity for intensive agriculture in China. Geoderma, 123:319–331.