Changes in the Heavy Metal Levels in Highway Landscaping and Protective Effect of Vegetative Materials

Table 2

The physical and chemical analyses of soil samples.

Land-use type	Sample number	pH	EC (dS/m)	CaCO3 (%)	Organic matter (%)
AA	2	7.56	0.54	2.83	1.69
	21	7.65	0.53	18.85	2.03
NL	9	7.02	0.22	1.51	3.63
	11	7.74	0.35	4.24	1.72
	15	7.76	0.21	1.18	1.32
	17	6.87	0.59	1.84	3.00
RA	4	6.85	1.02	6.50	1.72
	7	7.57	0.41	3.96	3.05
	10	7.64	0.20	1.88	1.14
	12	7.82	0.43	2.36	2.42
	13	7.25	0.44	1.27	2.56
	14	7.41	0.40	2.07	1.46
	19	7.64	0.48	8.06	1.51
	22	7.83	1.24	20.35	6.36
	23	7.96	0.26	47.12	2.37
RS	3	7.85	0.28	28.27	4.40
	5	7.72	0.39	2.36	1.53
	16	7.61	0.13	1.98	0.21
	18	7.62	0.10	1.23	0.28
	20	7.41	0.15	1.41	1.19
UA	1	7.43	0.79	19.69	3.18
	6	7.62	0.17	1.37	1.06
	8	7.8	0.18	1.41	4.06
AA_Mean		7.61	0.53	10.84	1.86
NL_Mean		7.35	0.34	2.19	2.42
RA_Mean		7.55	0.54	10.40	2.51
RS_Mean		7.64	0.21	7.05	1.52
UA_Mean		7.62	0.38	7.49	2.77