Economic and Environmental Geology

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Table. 2.

Table. 2.

Pearson correlation coefficients higher than 0.6 among pseudo-total and each single extraction method

Cd Soil condition DTPA *pH < 6.6,
**CEC > 20.0,
***OM > 4.6
low pH* log AR 0.701 (28)
high CEC** log HNO3 0.630 (24)
high OM*** log HNO3 0.651 (22)
Cr Soil condition log HNO3 *OM < 4.2
low OM* log AR 0.703 (37)
Cu Soil condition log HNO3 log DTPA *AR > 36.0,
**pH < 6.5,
***CEC > 20.0,
****OM > 4.2
Total log CaCl2 0.644 (39)
high AR* log CaCl2 0.669 (22)
low AR log AR 0.637 (36)
low pH** log AR 0.613 (34)
log CaCl2 0.767 (19)
high CEC*** log AR 0.629 (31)
log CaCl2 0.675 (18)
log HNO3 0.657 (28)
low CEC log CaCl2 0.659 (21)
high OM**** log CaCl2 0.650 (16)
low OM log CaCl2 0.637 (23)
Ni Soil condition log HNO3 log DTPA *AR < 43.0,
**pH < 6.5,
***CEC > 20.0,
****OM < 4.2
Total log HNO3 0.617 (58)
low AR* log HNO3 0.658 (29)
low pH** log HNO3 0.733 (30)
high CEC*** log HNO3 0.724 (21)
low OM**** log AR 0.641 (39)
log HNO3 0.666 (39)
Zn Soil condition log HOAc log HNO3 log DTPA *AR > 119.1,
**pH > 6.5,
***CEC > 19.9,
****OM > 4.3
Total AR 0.802 (28) 0.646 (67) 0.613 (47)
log HOAc 0.767 (28) 0.887 (20)
log HNO3 0.767 (47)
high AR* AR 0.686 (13)
log HOAc 0.870 (13) 0.865 (12)
log HNO3 0.813 (24)
low AR AR 0.689 (23)
high pH** AR 0.808 (12) 0.634 (31)
log HOAc 0.885 (12) 0.847 (9)
log HNO3 0.827 (26)
low pH AR 0.791 (16) 0.690 (36) 0.737 (21)
log HOAc 0.636 (16) 0.910 (11)
log HNO3 0.713 (21)
high CEC*** AR 0.753 (13) 0.838 (30) 0.713 (19)
log HOAc 0.843 (13) 0.912 (9)
log HNO3 0.796 (19)
low CEC AR 0.883 (15) 0.628 (37) 0.621 (28)
log HOAc 0.831 (15) 0.895 (11)
log HNO3 0.738 (28)
high OM**** AR 0.816 (15) 0.627 (30) 0.762 (17)
CaCl2 0.672 (15)
log HOAc 0.706 (15) 0.892 (10)
log HNO3 0.786 (17)
low OM AR 0.881 (13) 0.724 (37) 0.605 (30)
log HOAc 0.892 (13) 0.886 (10)
log HNO3 0.768 (30)

For Pb, no Pearson correlation coefficient higher than 0.6 existed. The numbers in brackets represent the number of samples. CEC: cation exchange capacity (meq/100 g), OM: organic matter content (%), AR: aqua regia extraction (mg/kg)

Econ. Environ. Geol. 2021;54:259-69 https://doi.org/10.9719/EEG.2021.54.2.259
© 2021 Econ. Environ. Geol.