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RMSE
GIS
Ayoubi and Jalalian, 2006.
(Sys et al 1991)
Webster and Oliver, 2001
Hosseini et al 1994
GPSGIS
Shao et al., 2006
Davis, 1987
Amini et al.
Mohammadi
TM
et al. Joanna
Meul and Van Meirvenne
DEM
Alison et al.
pH
EC
(inverse distance weighing, IDW)
Sparks et al., 1996
Walkley and Black
DTPA
Sparks et al., 1996
IDW
Davis, 1987 ;Wei,
2006;Jiachun, 2007
GIS
Zareian-jahromi, 2007
;Bregt et al. 2006
Wei,1992 ; Shao, 2006
IDW
Davis, 1987
1
ii n
ii
D
D
iiDii
(best linear unbiased estimator, BLUE)
*
1
( ) ( )n
i ii
Z x z x
Z*(x)i
iZ(x)
n
Z
Davis, 1987
i
1
1n
ii
Hassani-pak, 1998
Minxzxzxzvar
Davis, 1987
*
1 1
( ) ( )n n
i e i i ke k
Z x x y xk
Z*(xi) xi
iZk
yZ(xi)y(xi)
Mohammadi, 2006
12( ) [ ( ) ( )][ ( ( )]i i k kzy h z x h z x y x y x
(zy)hyZ
Z(xi)y(ki)
(Hassani-pak,
1998)
(root mean square error,
RMSE)
N
iii xZxZ
NESMR
1
2* ))()((1
...
Z*(xi)
Z(xi)
N
(ppm)
(ppm)
*
(ppm)
(ppm)
(ppm)
*
(%)
*
(%)
*
(%)
*
(%)
*
(Cmol/Kg)
*
RMSE
Robinson and Metternicht, 2006
CO/CO+C
IDW
RMSE
IDW
GIS
Co
CO+C
m
CO/CO+C
Amini et al.
Mohammadi
Alison et al.
Jiachun and Haizhen
Xiaopeng, et al.
Shao, et al.
Shi, et
al
IDW
Hosseini, et al.
SAR
IDW
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B. and Philip, M. D. (2005). Improving map accuracy of soil variables using soil electrical conductivity as a covariate. Precision Agriculture. Vol (6): 255 270.
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Ayoubi, Sh. and A. Jalalian. (2006) Land evaluation (Agriculture and Natural Resources). Isfahan: Isfahan University of Technology. In Persian.
Bregt, A. K., Stoorvogel, J.J., Bounma, J. and Stein, A. (1992). Mapping Ordinal Data in Soil Survey: a Costa Rican Example. Soil Sci Soc Am J. Vol (56):525 531.
Davis, B.M. (1987).Uses and abuses of cross-validationin geostatistics .Math. Geol.Vol (19), 241 248.
Hassani-pak, A. 1998. Geostatistics. Tehran: University of Tehran. In Persian.
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Shao, W. H., Ji, Y. J., Li, P. Y. and You, L. B. (2006). Spatial Variability of Soil Nutrients and Influencing Factors in a Vegetable Production Area of Hebei Province in China. Nutr Cycl Agroecosyst. Vol (75):201 212.
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Sys, Ir.C., E. Van Ranst and Ir. J. Debaveye. (1991). Land evaluation Part I. Principal Land evaluation and Crop production calculation general administration for development. Cooperation agric.
Webster, R., Oliver, M.A. (2001). Geostatistics for Environmental Scientists. Australia: Wiley.
Wei, J. B., Xiao, D. N., Zhang, X. Y., Li, X. Z. and Li, X. Y. (2006). Spatial Variability of Soil Organic Carbon in Relation to Environmental Factors of a Typical Small Watershedin the Black Soil Region, Northeast China. Environmental Monitoring and Assessment. Vol (121): 597 613.
Xiaopeng, Y. and Lingqing, W. (2008). Spatial Analysis and Hazard Assessment of Mercury in Soil around the Coal-Fired Power Plant: A Case Study from the City of Baoji, China. Environ Geol. Vol (53):1381 1388
Zareian-jahromi, M. (2007). An investigation on morphometric of sand dune in south of Iran. MSc thesis. University of Tehran. In Persian.
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