1- Aparicio V., and Costa J.L. 2007. Soil quality indicators under continuous cropping systems in the Argentinean Pampas. Soil and Tillage Research 96(1): 155-165.
2- Aria P., and Mirkhani R. 2005. Methods of Soil Physical Analysis, Technical Bulletin, Soil and Water Research Institute, Iran, No:479. (In Persian)
3- Brejda J.J., Moorman T.B., Smith J.L., Karlen D.L., Allan D.L., and Dao T.H. 2000. Distribution and variability of surface soil properties at a regional scale. Soil Science Society of America Journal 64(3): 974-982.
4- Cheng J., Ding C., Li X., Zhang T., and Wang X. 2016. Soil quality evaluation for navel orange production systems in central subtropical China. Soil and Tillage Research 155: 225-232.
5- Cherubin M.R., Karlen D.L., Cerri C.E., Franco A.L., Tormena C.A., Davies C.A., and Cerri C.C. 2016. Soil quality indexing strategies for evaluating sugarcane expansion in Brazil. PloS one 11(3): e0150860.
6- de Paul Obade V., and Lal R. 2016. Towards a standard technique for soil quality assessment. Geoderma 265: 96-102.
7- Doran J.W., and Parkin T.B. 1996. Quantitative indicators of soil quality: a minimum data set. Methods for assessing soil quality/editors, John W. Doran and Alice J. Jones; editor-in-chief SSSA, Jerry M. Bigham; managing editor, David M. Kral; associate editor, Marian K. Viney.
8- Friedman D., Hubbs M., Tugel A., Seybold C., and Sucik M. 2001. Guidelines for soil quality assessment in conservation planning. United States Department of Agriculture. Natural Resources Conservation.
9- Gong L., Ran Q., He G., and Tiyip T. 2015. A soil quality assessment under different land use types in Keriya river basin, Southern Xinjiang, China. Soil and Tillage Research 146: 223-229.
10- Jolliffe I.T. 1986. Principle component analysis. Springer-Verlag.
11- Juhos K., Szabó S., and Ladányi M. 2015. Influence of soil properties on crop yield: a multivariate statistical approach, International Agrophysics 29: 433-440.
12- Kaiser H.F. 1970. A Second-Generation Little Jiffy. Psychometrika 35(4): 401-415.
13- Karlen D.L., Rosek M.J., Gardner J.C., Allan D.L., Alms M.J., Bezdicek D.F., Flock M., Huggins D.R., Miller B.S., and Staben M.L. 1999. Conservation reserve program effects on soil quality indicators. Journal of Soil and Water Conservation 54(1): 439-444.
14- Khadem A., Golchin A., Mashhadi Jafarloo A., Zaree E., and Naseri E. 2014. Effect of Highly Acidified Soil on Soil Nutrient Availability and Corn (Zea mays L.) Growth. Agronomy Journal (Pajouhesh & Sazandegi) 107: 1-7.
15- Larson W.E., and Pierce F.J. 1991. Conservation and enhancement of soil quality. In Evaluation for sustainable land management in the developing world: proceedings of the International Workshop on Evaluation for Sustainable Land Management in the Developing World, Chiang Rai, Thailand 15-21.
16- Li P., Zhang T., Wang X., and Yu D. 2013. Development of biological soil quality indicator system for subtropical China. Soil and Tillage Research 126: 112-118.
17- Masto R.E., Chhonkar P.K., Singh D., and Patra A.K. 2008. Alternative soil quality indices for evaluating the effect of intensive cropping, fertilisation and manuring for 31 years in the semi-arid soils of India. Environmental Monitoring and Assessment 136(1-3): 419-435.
18- MATLAB R2015b. 2015. Software for technical computing and model-based design. The Mach Works Ins, USA.
19- Moshiri F., Shahabi A.A., Keshavarz P., Khogar Z., Feyzi Asl V., Tehrani M.M., Asadi Rahmani H., Samavat S., Gheibi M.N., Sedri M.H., Rashidi N., Saadat S., and Khademi Z. 2014. Guidelines for integrated soil fertility and plant nutrition management of wheat. Soil and Water Research Institute, Iran. (In Persian)
20- Nabiollahi K., Taghizadeh-Mehrjardi R., Kerry R., and Moradian S. 2017. Assessment of soil quality indices for salt-affected agricultural land in Kurdistan Province, Iran. Ecological Indicators 83: 482-494.
21- Olsen S.R., Cole C.V., Watanabe F.S., and Dean L.A. 1954. Estimation of available phosphorus in soils by extraction with sodium bicarbonate. U.S. Dept. of Agric. Circ. 939 pp.
22- Page A.L., Miller R.H., and Keeney D.R. 1982. Methods of Soil Analysis, part 2, chemical and microbiological properties. American Society of Agronomy, Inc. Soil Science Society of America. Madison, WI.
23- Qi Y., Darilek J.L., Huang B., Zhao Y., Sun W., and Gu Z. 2009. Evaluating soil quality indices in an agricultural region of Jiangsu Province, China. Geoderma 149(3): 325-334.
24- Rahmanipour F., Marzaioli R., Bahrami H.A., Fereidouni Z., and Bandarabadi S.R. 2014. Assessment of soil quality indices in agricultural lands of Qazvin Province, Iran. Ecological Indicators 40: 19-26.
25- Ramezani F., Jafari S., Salavati A., and Khalili Moghaddam B. 2011. Study the Soil Quality Changes Indicators Using Nemoro and Integrated Quality Index Models in Some Khuzestan’s Soils. Journal of Water and Soil 29(6): 1629-1639. (In Persian with English abstract)
26- Ranjbar A., Emami H., Khorasani R., and Karimi Karoyeh A.R. 2016. Soil Quality Assessments in Some Iranian Saffron Fields. Journal of Agricultural Science and Technology 18(3): 865-878.
27- Sánchez-Navarro A., Gil-Vázquez J. M., Delgado-Iniesta M.J., Marín-Sanleandro P., Blanco-Bernardeau A., and Ortiz-Silla R. 2015. Establishing an index and identification of limiting parameters for characterizing soil quality in Mediterranean ecosystems. Catena 131: 35-45.
28- Shahab Arkhazloo 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(3): 312-320.
29- Shahab Arkhazloo H., Emami H., Haghnia Gh., and Karimi A. 2011. Determining most Important Properties for Soil Quality Indices of Agriculture and Range Lands in a some Parts of Southern Mashhad. Journal of Water and Soil 25(5), 1197-1205. (In Persian with English abstract)
30- Singh A.K., Mazumdar S.P., Saha A.R., and Kundu D.K. 2017. Soil Quality Changes Resulting from long-term fertilizer application under intensive cropping system in alluvial soils. Communications in Soil Science and Plant Analysis 48(13): 1503-1510.
31- SYS C., Van Ranst E., and Debaveye J. 1993. land evaluation. part III: crop requirements. General Administration for Development cooperation, Agricultural publication, No: 7, Brussels Belgium, 199 pp.
32- Torbert H.A., Krueger E., and Kurtener D. 2008. Soil quality assessment using fuzzy modeling. International Agrophysics 22(4): 365-370.
33- USDA. 2008. Soil Quality Indicator Sheets. USDA Natural Resources Conservation Service. https://www.nrcs.usda.gov.
34- Walkley A., and Black I.A. 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.
35- Wander M.M., Walter G.L., Nissen T.M., Bollero G.A., Andrews S.S., and Cavanaugh-Grant D.A. 2002. Soil quality. Agronomy Journal 94(1): 23-32.
36- Wang X.J., and Gong Z.T. 1998. Assessment and analysis of soil quality changes after eleven years of reclamation in subtropical China. Geoderma 81: 339–355
37- Yanbing Q., Darilek J.L., Biao H., Yongcun Z., Sun W., and Gu Z. 2009. Evaluating soil quality indices in an agricultural region of Jiangsu Province, China. Geoderma 149: 325-334.
