Joint International Conference on Long-term Experiments ...

Soil
Number
Table 3. Copper and Zn extracted by three extractants for various soils
KCl-
EDTA
Zn (mg/kg) Cu (mg/kg)
LE
CaCl2-
DTPA
KCl-
EDTA
LE
CaCl2-
DTPA
Sand
1 2.02 1.52 0.51 0.62 7.45 2.11
2 0.50 0.32 0.13 2.20 0.37 0.15
3 0.58 0.51 0.20 0.84 1.12 0.37
4 1.04 1.71 0.46 2.46 3.35 1.04
5 1.86 2.66 1.17 1.64 1.86 1.07
6 2.46 2.86 1.09 4.52 5.59 1.89
7 2.42 2.92 1.37 3.82 4.72 2.31
8 6.80 13.71 2.16 4.40 9.07 2.24
Average 2.21 3.28 0.89 2.35 3.50 1.28
Scattering 2.01 4.33 0.69 1.45 2.57 0.85
CV% 90.95 132.25 78.06 61.99 73.52 66.46
Loam
9 2.02 2.92 0.46 6.90 8.45 2.06
10 1.42 1.65 0.33 4.46 5.59 1.07
11 0.84 1.84 0.34 1.34 3.23 0.77
12 0.64 2.03 0.13 4.28 6.21 2.73
13 1.58 2.73 0.90 2.40 4.84 1.54
14 1.42 2.35 0.44 2.88 5.71 1.09
15 1.18 3.93 1.37 6.16 7.70 2.01
16 2.52 2.47 0.98 6.02 6.71 2.46
17 0.70 0.70 0.47 3.92 4.47 1.89
18 2.52 2.54 0.84 7.78 9.44 2.46
19 2.82 1.90 0.63 5.14 5.22 1.91
Average 1.61 2.28 0.63 4.59 6.49 1.85
Scattering 0.77 0.82 0.36 1.97 1.99 0.65
CV% 79.86 52.59 90.65 315.95 217.56 252.62
Clay
20 2.72 3.43 1.74 4.54 5.96 2.98
21 3.12 2.22 0.47 10.56 11.18 4.62
22 1.34 1.65 0.39 5.74 9.19 2.34
23 0.92 2.16 0.27 3.46 6.83 2.21
24 5.44 6.09 2.70 19.36 11.44 6.58
25 4.44 3.81 2.25 12.9 14.04 5.47
26 8.28 7.23 3.42 12.9 13.17 4.72
27 3.44 3.55 1.71 9.68 9.44 3.48
Average 3.71 3.77 1.62 9.33 9.63 3.85
Scattering 2.37 1.97 1.16 5.55 3.35 1.73
CV% 47.88 36.06 57.58 42.92 30.64 35.03
Summarised
Average 2.41 3.02 1.00 5.60 6.75 2.35
Scattering 1.90 2.60 0.85 4.30 3.43 1.51
CV% 79.11 86.34 85.36 76.70 50.81 64.32
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