Table 4: Relative abundance of clay mineral and some electrochemical characteristics of the soils studied.

Soil numberDepth (cm)ChlSmePalIll KaoSepIll-Sme pH0δpH ( )δpH ( ) (cmolckg−1) (cmolckg−1)
%

10–25178381613<83.35−0.19−4.65−38−48
25–7815133711243.20−0.21−4.40−27.3−35
78–1102218357183.30−0.18−4.25−35.7−43
100–1502022315223.20−0.25−4.50−29.2−38.9

20–2016162518253.15−0.17−4.70−21.2−29.5
20–503722241252.90−0.17−5.00−19.1−27
50–10031251888<103.00−0.22−4.80−14.3−22
100–15030291779<82.80−0.20−5.10−15.4−22.7

30–30101533266<103.00−0.20−4.75−22.1−32
30–802121302083.15−0.19−4.69−29.7−41
80–150112629157<123.10−0.21−4.46−31.8−42

40–20238163585<52.95−0.14−4.90−18.1−34
20–702014142418102.87−0.10−5.06−11.2−25.5
70–9536161020993.20−0.17−4.60−13.2−22
95–150272091598<123.14−0.11−4.80−17.2−20.9

50–45181514337<133.11−0.16−4.64−15.9−24.1
45–150252421303.25−0.19−4.65−14.2−22.4

60–4220152330753.01−0.19−4.77−24.5−32
42–881921152488<52.87−0.22−5.03−20.1−28.9
88–15025251220992.90−0.19−4.99−24.3−32.5

70–3628143226Tr3.15−0.24−4.38−25.3−35
36–862420302063.10−0.23−4.70−23.4−32
86–15019261817911Tr3.15−0.18−4.54−24.3−34

80–30301827253.17−0.15−4.63−17.3−24
30–70332623183.10−0.06−4.75−19.2−25.5
70–150343020162.98−0.07−4.83−18.4−23.8

Chl: chlorite, Sme: smectite, Pal: palygorskite, Ill: illite, Kao: kaolinite, Sep: sepiolite, Ill-Sme: illite-smectite.