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. 2021 Mar 5;11:5309. doi: 10.1038/s41598-021-84541-x

Table 2.

The pH indicator, conductivity (EC), chloride and cation concentrations in soils.

Soil samples Depth (cm) pH EC (µS cm−1) Cl Na+ K+ Mg2+ Ca2+
H2O KCl (mg 100 g−1 d. m.)
Roadside (n = 10) 0–10 7.8–8.1 7.3–7.4 171–298 1.67 (0.69) 17.9 (6.1) 3.65 (2.11) 0.44 (0.32) 3.72 (0.55)
10–30 8.0–8.5 7.3–7.4 239–419 1.84 (0.58) 16.2 (2.6) 1.85 (0.6) 0.13 (0.18) 3.30 (0.52)
Park (n = 5) 0–10 7.5–7.7 6.9–7.3 90–130 0.39 (0.08) 2.36 (1.0) 4.52 (0.85) 1.76 (0.12) 1.67 (0.13)
10–30 7.6–7.8 6.9–7.3 126–198 0.66 (0.14) 0.57 (0.11) 2.42 (0.17) 0.67 (0.03) 4.64 (0.22)
Statistical test (n = 15) 0–10 * * * * * n.s * *
10–30 * n.s * * * n.s * *

Values are: min–max (pH, EC), median, and IQR in parentheses (Cl, Na, K, Mg, Ca).

*p < 0.001 significant difference between roadside and park samples (Mann–Whitney U test).