The Influence of Vermicompost and Various Concentrations of Lead on the Enzymatic Activity of Sierozem Soils of Kazakhstan

Table 3

Group composition of sierozem humus (0–25 cm).

Sampling from fields at a distance (m)	Total carbon content (Ctotal) (%)	The content of C (% of Ctotal) in			СHA/СFA
		Humic acid (HA)	Fulvic acid (FA)	Nonhydrolyzable residue
From the landfill “Temir” SHW (Otrar district)
100	0.32	7.2	24.1	68.8	0.31
150	0.44	9.0	21.0	70.0	0.43
250	0.64	7.0	17.2	75.8	0.40
500	0.70	8.1	20.2	71.7	0.40
From the landfill “Maidantal” SHW (Sauran district)
100	0.54	11.1	30.6	62.6	0.36
150	0.78	15.0	31.3	53.6	0.48
250	1.10	20.9	44.6	34.0	0.47
500	1.20	22.2	44.4	33.2	0.50