Abstract

This study was conducted on the mine spoils planted with umbrella pine (Pinus pinea L.) and black locust (Robinia pseudoacacia L.). On forest floor samples; unit mass, total nitrogen and organic matter properties were determined. On soil samples; bulk density, fine soil fraction, pH, organic carbon, total nitrogen, sand, silt and clay percentages were determined. Results in black locust and umbrella pine plantations were compared statistically. In conclusion, 17 year after plantations, average forest floor accumulation was 6707.15 kg/ha under black locust, and 13700.00 kg/ha under umbrella pine. Forest floor and soils of black locust have significantly higher total nitrogen than those of umbrella pine. Keywords: Mine spoil, umbrella pine, black locust, forest floor, soil.

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