Account

Table 2 Percentage share of humic substances, humic and fulvic acids in C_org and C_HA:C_FA ratio

From: Mutual relations between PAHs derived from atmospheric deposition, enzymatic activity, and humic substances in soils of differently urbanized areas

	Year	C_HS	C_HA	C_FA	C_HA:C_FA
	Year	(% C_org)			C_HA:C_FA
Urban area	2014	31.76a	20.77a	10.99a	1.89a
	2015	29.16a	19.38a	9.78a	1.98a
	2016	29.92a	20.12a	9.80a	2.05a
Suburban area	2014	42.08ab	24.36a	17.72ab	1.37ab
	2015	39.86ab	23.95a	15.91ab	1.50ab
	2016	41.06ab	24.11a	16.95ab	1.42ab
Rural area	2014	54.52b	25.21a	29.31b	0.86b
	2015	54.15b	24.91a	29.24b	0.85b
	2016	54.30b	25.27a	29.03b	0.87b

Means followed by the same letters do not differ significantly (p > 0.05)

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