Organic Amendments and Earthworm Addition Improve Properties of Nonacidic Mine Tailings

Table 2

Experimental treatments used in this study. Proportions (g amendment 100 g⁻¹ mine tailings) of organic amendments are presented on an equivalent oven-dry basis relative to initial mine tailings.

			Treatment code
Biosolids	Sawdust	Pulp sludge	Without earthworms	With earthworms
10	10	0	T1-WO	T1-W
10	0	10	T2-WO	T2-W
10	5	5	T3-WO	T3-W
10	0	0	T4-WO	T4-W
20	10	0	T5-WO	T5-W
20	0	10	T6-WO	T6-W
20	5	5	T7-WO	T7-W
20	0	0	T8-WO	T8-W

Appropriate treatments received earthworms 7 weeks after the substrates were mixed and the incubation was started.