___

• B´adossy A, Lehmann W (1998). Spatial distribution of soil moisture in a small catchment. Part 1: geostatistical analysis. Journal of Hydrology 206: 1–15.
• Biggar J W, Nielsen D R (1976). Spatial variability of leaching characteristics of a field soil. Water Resour. Res., 12: 78–84.
• Bocchi S, Castrignano A, Fornaro F, Maggiore T (2000). Application of factorial kriging for mapping soil variation at field scale. European Journal of Agronomy 13: 295-308.
• Bouma J (1973). Use of physical methods to expand soil survey inter- pretations of soil drainage conditions. Soil Sci. Soc. Am. Proc., 37: 413–412.
• Bouyoucous G J (1951). A recalibration of hydrometer method for making mechanical analysis of soils. Agronomy Journal, 43: 434-438.
• Bülent T B, Öztaş T (2012). Assessment of spatial distribution of some soil properties with geostatistics method. Süleyman Demirel Üniversitesi Ziraat Fakültesi Dergisi, 7 (2):10- 22.
• Cambardella C A, Moorman T B, Nowak J M, Parkin T B, Karlen D L, Turco R F, Konopka A E (1994). Field-scale variability of soil properties in central Iowa soils. Soil Sci. Soc. Am. Journ., 58:1501-1511.
• Demir Y, Erşahin S, Güler M, Cemek B, Günal H, Arslan H (2008). Spatial variability of depth and salinity of groundwater under irrigated ustifluvents in the Middle Black Sea Region of Turkey. Environ Monit Assess., doi: 10.1007/s10661-008-0582-1.
• Famiglietti J S, Rudnicki J W, Rodell M (1998). Variability in surface moisture content along a hillslope transect: Rattlesnake Hill, Texas. Journal of Hydrology, 210: 259–281.
• Fu W, Tunney H, Zhang C (2010). Spatial variation of soil nutrients in a dairy farm and its implications for site-specific fertilizer application. Soil Till. Res., 106:185–193.
• Gallardo A (2003). Spatial variability of soil properties in a flood plain forest in northwest Spain. Ecosystems, 6: 564-576.
• Golaszewski J (2002). Geostatistical approach to data from field experiments with check plots. Electronic Journal of Polish Agricultural Universities, Agronomy, 5:(2).
• Grego, C R , Vieira, S R, Lourenc¸a˜o, A L (2006). Spatial distribution of Pseudaletia sequax Franclemlont in triticale under no-till management. Sci. Agric., 63: 321–327.
• GS+ (1998). Geostatistics for the environmental sciences, Gamma Design Software, Plainwell, MI, USA.
• Han F, Zheng J, Hu W, Du F, Zhang X (2010). Spatial variability and distribution of soil nutrients in a catchment of the loess plateau in China. Acta Agriculturae Scandinavica, Section B - Plant Soil Science, 60: 1651-1913.
• Hu W, Shao M A, Wang Q J, Fan J, Reichardt K (2008). Spatial variability of soil hydraulic properties on a steep slope in the Loess Plateau of China. Scientia Agricola, 65: 268-276.
• Iqbal J, Thomasson J A, Jenkins J N, Owens P R, Whisler F D (2005). Spatial variability analysis of soil physical properties of alluvial soils. Soil Sci. Soc. Am. Journal, 69:1338-1350. Journel A G, Huijbregts C J (1987). Mining geostatistics. Academic Press, London.
• Kerry R, Oliver M A (2004). Average variograms to guide soil sampling for land management. Int. J. Appl. Earth Obs., 5:307–325.
• Kızılkaya R, Dengiz O, Özyazıcı M A, Aşkın T, Mikayilov F, Shein E V (2011). Spatial distribution of heavy metals in soils of the Bafra Plain in Turkey. Eurasian Soil Science, 44 (12): 1343- 1351.
• Korucu T, Arslan S, Günal H, Şahin M (2009). Spatial and temporal variation of soil moisture content and penetration resistance as affected by post harvest period and stubble burning of wheat. Fresenius Environmental Bulletin, 18 (9a):1736-1747.
• Miao Y, Robinson C A, Stewart B A, Evett S R (2000). Comparison of soil spatial variability in crop and rangeland. In: Proceedings of the Fifth International Conference on Precision Agriculture, July 16-19, Bloomington, MN, USA.
• Muneto H, Naoko T K C, Chongrak W, Hiroshi T (2003). Fire history influences on the spatial heterogeneity of soil nitrogen transformations in three adjacent stands in a dry tropical forest in Thailand. Plant and Soil, 249: 309-318.
• Özgöz E (2009). Long term conventional tillage effect on spatial variability of some soil physical properties. J. Sustain. Agric., 33: 142–160.
• Richards L A (ed) (1954). Diagnosis and improvement of saline and alkali soils, USDA Agriculture Handbook, No. 60.
• Robertson GP, Klingensmith K M, Klug M J, Paul E A, Crum J R, Ellis B G (1997). Soil resources, microbial activity, and primary production across an agricultural ecosystem. Ecol. Appl., 7:158-170.
• Schimel D, Melillo J, Tian H, McGuire D, Kicklighter D, Kittel T, Rosenbloom N, Running S, Thornton P, Ojima D, Parton W, Kelly R, Sykes M, Neilson R, Rizzo B (2000). Contribution of increasing CO2 and climate to carbon storage by cosystems in the United States. Science, 287: 2004–2006.
• Sun B, Zhou S L, Zhao Q G (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.
• Tesfahunegn G B, Tamene L, Vlek P. L.G (2011). Catchment-scale spatial variability of soil properties and implications on site-specific soil management in northern Ethiopia . Soil & Tillage Research, 117:124–139.
• Trangmar B B, Yost RS, Uehara G (1985). Application of geostatistics to spatial studies of soil properties. Adv. Agron., 38:45-94.
• Troelstra S R, Lotz L A P, Wagenaar R, Sluimer L (1990). Temporal and spatial variability in soil nutrient status of a former beach plain. Plant and Soil, 127:1-12. Webster R (2001). Statistics to support soil research and their presentation. European J. Soil Sci., 52:331-340.
• Ying Z, Peth S, Hallett P; Wang X, Giese M. YingZhi G, Horn R (2011). Factors controlling the spatial patterns of soil moisture in a grazed semi-arid steppe investigated by multivariate geostatistics. Ecohydrology, 4 (1):36-48.
• Yeşilırmak E, Atatanır L, Yorulmaz A, Aydın G, Turgut C (2011). Spatial variability of Fe, Mn, Zn and Cu in soils of büyük menderes delta in western Turkey. Fresenius Environmental Bulletin, 20 (2):310-316.