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[57] Grunwald S, Thompson J A, Boettinger J L, 2011. Digital soil mapping and modeling at continental scales: Finding solutions for global issues. Soil Science Society of America Journal, 75(4): 1201-1213. doi:  10.2136/sssaj2011.0025
[58] Heil K, Schmidhalter U, 2012. Characterisation of soil texture variability using the apparent soil electrical conductivity at a highly variable site. Computers & Geosciences, 39: 98-110. doi:  10.1016/j.cageo.2011.06.017
[59] Hu S, Zhao R, Tian C et al., 2009. Empirical models of calculating phreatic evaporation from bare soil in Tarim river basin, Xinjiang. Environmental Earth Sciences, 59(3): 663-668. doi:  10.1007/s12665-009-0063-z
[60] Karl J W, Maurer B A, 2010. Spatial dependence of predictions from image segmentation: A variogram-based method to determine appropriate scales for producing land-management information. Ecological Informatics, 5(3): 194-202. doi: 10.1016/j.ecoinf. 2010.02.004
[61] Li Q, Chen Y, Shen Y et al., 2011. Spatial and temporal trends of climate change in Xinjiang, China. Journal of Geographical Sciences, 21(6): 1007-1018. doi:  10.1007/s11442-011-0896-8
[62] Liu D M, Abuduwaili J, Lei J Q et al., 2011. Deposition rate and chemical composition of the aeolian dust from a bare saline playa, Ebinur Lake, Xinjiang, China. Water Air and Soil Pollution, 218(1-4): 175-184. doi:  10.1007/s11270-010-0633-4
[63] Liu F, Geng X, Zhu A X et al., 2012. Soil texture mapping over low relief areas using land surface feedback dynamic patterns extracted from MODIS. Geoderma, 171-172: 44-52. doi:  10.1016/j.geoderma.2011.05.007
[64] Lobell D B, Lesch S M, Corwin D L et al., 2010. Regional-scale assessment of soil salinity in the red river valley using multi-year MODIS EVI and NDVI. Journal of Environmental Quality, 39(1): 35-41. doi:  10.2134/jeq2009.0140
[65] MacMillan R A, Moon D E, Coupé R A et al., 2010. Predictive ecosystem mapping (PEM) for 8.2 million ha of forestland, British Columbia, Canada. In: Boettinger J L (eds). Digital Soil Mapping: Bridging Research, Environmenatal Application, and Oper ation. Netherlands: Springer, 337-356.
[66] Masoud A A, Koike K, 2006. Arid land salinization detected by remotely-sensed landcover changes: A case study in the Siwa region, NW Egypt. Journal of Arid Environments, 66(1): 151-167. doi:  10.1016/j.jaridenv.2005.10.011
[67] McBratney A B, Mendonca S M L, Minasny B, 2003. On digital soil mapping. Geoderma, 117(1-2): 3-52. doi: 10.1016/ S0016-7061(03)00223-4
[68] Metternicht G I, Zinck J A, 2003. Remote sensing of soil salinity: Potentials and constraints. Remote Sensing of Environment, 85(1): 1-20. doi:  10.1016/S0034-4257(02)00188-8
[69] Mulder V L, de Bruin S, Schaepman M E et al., 2011. The use of remote sensing in soil and terrain mapping—A review. Geoderma, 162(1-2): 1-19. doi: 10.1016/j.geoderma.2010.12. 018
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[71] Ohmaan J L, Gregory M J, 2002. Predictive mapping of forest composition and structure with direct gradient analysis and nearest neighbor imputation in coastral Oregon, USA. Canadian Journal of Forest Research, 32(4): 725-741. doi:  10.1139/x02-011
[72] Qadir M, Oster J D, 2004. Crop and irrigation management strategies for saline-sodic soils and waters aimed at environ­mentally sustainable agriculture. Science of the Total Envi­ronment, 323(1-3): 1-19. doi: 10.1016/j.scitotenv.2003. 10.012
[73] Qadir M, Tubeileh A, Akhtar J et al., 2008. Productivity enhancement of salt-affected environments through crop diversification. Land Degradation & Development, 19(4): 429-453. doi:  10.1002/ldr.853
[74] Qiao Mu, Zhou Shengbin, Lu Lei et al., 2011. Temporal and spatial changes of soil salinization and improved countermeasures of Tarim Basin Irrigation District in recent 25a. Arid Land Geography, 34(4): 604-613. (in Chinese)
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[77] Rodríguez-Pérez J, Plant R, Lambert J J et al., 2011. Using apparent soil electrical conductivity (ECa) to characterize vineyard soils of high clay content. Precision Agriculture, 12(6): 775-794. doi:  10.1007/s11119-011-9220-y
[78] Sheng J, Ma L, Jiang P A et al., 2010. Digital soil mapping to enable classification of the salt-affected soils in desert agro-ecological zones. Agricultural Water Management, 97(12): 1944-1951. doi:  10.1016/j.agwat.2009.04.011
[79] Shi X, Franklin J, Chadwick O A et al., 2009. Integrating different types of knowledge for digital soil mapping. Soil Science Society of America, 73: 1682-1692. doi: 10.2136/ sssaj2007.0158
[80] Shi Xingmin, Li Youlin, Yang Jingchun, 2008. Climatic and tectonic analysis of Manas Lake changes. Scientia Geogra­phica Sinica, 28(2): 266-271. (in Chinese)
[81] Snyder W C, Wan Z, Zhang Y et al., 1998. Classification-based emissivity for land surface temperature measurement from space. International Journal of Remote sensing, 19(14): 2753-2774. doi:  10.1080/014311698214497
[82] Soil Survey Staff of Xinjiang, 1996. Soil of Xinjiang Province. Beijing: Science Press, 52-53. (in Chinese)
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[84] Szabolcs I, 1992. Salinization of soil and water and its relation to desertification. Desertification Control Bulletin, 21: 32-37.
[85] Wang F, Chen X, Luo G P et al., 2013. Detecting soil salinity with arid fraction integrated index and salinity index in feature space using Landsat TM imagery. Journal of Arid Land, 5(3): 340-353. doi:  10.1007/s40333-013-0183-x
[86] Wang Fangfang, Wu Shixin, Qiao Mu et al., 2009. Investigation and analysis on the salinization degree of cultivated land in Xinjiang based on 3S technology. Arid Zone Research, 26(3): 366-371. (in Chinese)
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[88] Wang Q, Li P H, Chen X, 2012. Modeling salinity effects on soil reflectance under various moisture conditions and its inverse application: A laboratory experiment. Geoderma, 170: 103-111. doi:  10.1016/j.geoderma.2011.10.015
[89] Wang Y, Li Y, 2013. Land exploitation resulting in soil salinization in a desert-oasis ecotone. Catena, 100: 50-56. doi:  10.1016/j.catena.2012.08.005
[90] Wei S, Dai Y, Liu B et al., 2012. A soil particle-size distribution dataset for regional land and climate modelling in China. Geoderma, 171-172: 85-91. doi: 10.1016/j.geoderma. 2011.01. 013
[91] Yang L, Zhu A X, Qi F et al., 2012. An integrative hierarchical stepwise sampling strategy for spatial sampling and its application in digital soil mapping. International Journal of Geographical Information Science, 27(1): 1-23. doi:  10.1080/13658816.2012.658053
[92] Zhang F, Tiyip T, Ding J et al., 2012. Spectral reflectance properties of major objects in desert oasis: A case study of the Weigan-Kuqa river delta oasis in Xinjiang, China. Environ­mental Monitoring and Assessment, 184(8): 5105-5119. doi:  10.1007/s10661-011-2326-x
[93] Zhang H , Wu J W, Zheng Q H et al., 2003. A preliminary study of oasis evolution in the Tarim Basin, Xinjiang, China. Journal of Arid Environments, 55(3): 545-553. doi: 10.1016/ S0140-1963(02)00283-5
[94] Zhu A X, Band L E, Dutton B et al., 1996. Automated soil inference under fuzzy logic. Ecological Modelling, 90(2): 123-145. doi:  10.1016/0304-3800(95)00161-1
[95] Zhu A X, Band L, Vertessy R et al., 1997. Derivation of soil properties using a Soil Land Inference Model (SoLIM). Soil Science Society of America Journal, 61(2): 523-533. doi:  10.2136/sssaj1997.03615995006100020022x
[96] Zhu A X, Hudson B, Burt J et al., 2001. Soil mapping using GIS, expert knowledge, and fuzzy logic. Soil Science Society of America Journal, 65(5): 1463-1472. doi: 10.2136/sssaj2001. 6551463x
[97] Zhu A X, Qi F, Moore A et al., 2010b. Prediction of soil properties using fuzzy membership values. Geoderma, 158(3-4): 199-206. doi:  10.1016/j.geoderma.2010.05.001
[98] Zhu A X, Yang L, Li B et al., 2008. Purposive sampling for digital soil mapping for areas with limited data. In: Hartemink A E (eds). Digital Soil Mapping with Limited Data. Netherlands: Springer, 233-245.
[99] Zhu A X, Yang L, Li B et al., 2010a. Construction of membership functions for predictive soil mapping under fuzzy logic. Geoderma, 155(3-4): 164-174. doi: 10.1016/j.geoderma.2009. 05.024
[100] Zhu B Q, Yang X P, Rioual P et al., 2011. Hydrogeochemistry of three watersheds (the Erlqis, Zhungarer and Yili) in northern Xinjiang, NW China. Applied Geochemistry, 26(8): 1535-1548. doi:  10.1016/j.apgeochem.2011.06.018
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