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pH
SC
CEC
Shukla et al., 2004
Yemefack et al., 2005
Cox
et al., 2003
Shukla et al.,
2004
Fax and Metla,2005Ovalles
and Collins, 1988
(Principal component analysis, PCA)
Cox et al., 2003; Jiang and Telen, 2004
Tchienkoua and Zeck
Boruvka et al, 2005
.( Fachinelli et al., 2001;
Skrbic and Onjia, 2007
Triaq et al.,
2005Shukla et al.
Ovalles and Collins
Piedmont plain
Fine, mixed, mesic, Fluventic
Haploxerepts
Soil Survey Staff,
2003
pH
Page et al.,
1987
Bremner and Mulvaney,1982
Olsen and Sommers, 1982
pHPage et
al., 1987
Page et al., 1987
Day, 1965
Black,
1986
Miller et al., 1988
SPSS
PCA
SPSS
PC1
Cox et al., 2003
Ovalles and Collins, 1988
(Jolliffe, 1986)
jij XaXaXaPC ...212111
PCaij
XjOvalles and Collins, 1988
Eigenvalue
Ovalles
and Collins, 1988; Cox et al., 2003
5.0)(5.0 eigenvaluePCSC
SCPC
Eigenvalue
Correlation matrix
SPSS
MERMSE
MERMSE
r2Sinowski and
Auerswald, 1999
))x(Z_)x(Z(×n1=ME i
n
1=i
*i
})]x(Z_)x(Z[×n1{=RMSE
n
1=i
212
i*
i
Z(xi)*Z(xi)
xi
pH
WildingCV
Paz-Gonzalez et al.
Godwin and Miller, 2003
CEC
)Ovalles and Collins, 1988
SC
SC
Ovalles and CollinsCox et al.
Eigen vector
SC
SC
Ovalles and Collins, 1988
EC
pH
EC
pH
CEC
EC
pH
pH
EC dSm-1
g cm-3
mg kg-1
mg kg-1
CEC Cmol(+) Kg-1
gr m-2
gr m-2
Biom
Grain CEC TN OM KavaPavaBDClaySandECpH
pH
EC
*
Sand
** *
Clay
**
**
BD
**
Pava
**
**
** ** Kava
**
**
**
**
**
OM
**
**
**
**
**
**
TN
**
**
**
*
**
**
** CEC
*
**
**
**
* ** **
** *
Grain
**
*
**
**
**
* ** **
** **
Biom
pHECsandClayBDPavaKava
OMTNCECGrainBiom
CEC
Jiang and
Telen
SC
SC
PC
PC
PC
PC
PC
PC
PC
PC
PCA
PC
PC
PC
PC
PC
pH EC
CEC
1 0.559 0.476
0.81 0.25
PC sand K
OM N2 0506 0.667
0.559 0.622
PC pH EC
Clay BD
CECClayPC 725.0494.03
CECKPC 507.0727.04
PPC 847.05
GYTY
1 2
3 4
2 **
GY=479.956 43.585PC 28.420PC
24.657PC 21.954PC
0.56R
1 2
3 4 5
2 **
TY=906.692 65.962PC 37.862PC
23.905PC 23.037PC 17.814
0.57
PC
R
RMSEME
r
RMSE , ME
r
Cox et al.
r
PCA
ME RMSE r
**
**
**
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Wilding, L. (1985). Spatial variability. Its documentation, accommodation, and implication to soil surveys. In: D. R. Nielson and J. Bouma (Eds). Soil Variability, Pudo, Wagenigen, the Netherlands.
Yemefack, M., Rossiter, D. G. and Njomgang, R. (2005). Multi-scale characterization of soil variability within an agricultural landscape mosaic system in southern Cameroon. Geoderma,125,117-14.
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