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Surface Reclamation of Sodic Spoil.
NTIS: PB 92-191691 Available for Reference At Bureau Libraries :55 pages
Plots were established on regraded abandoned mine spoil to determine if nearby good-quality spoil could be used in place of topsoil for the reclamation of these sites. Gypsum, calcium chloride, and powerplant ash were also tested to determine the effectiveness of these materials in reclaiming these sites. Two sites were selected on which very little vegetation was growing on highly sodic spoil material. Gypsum, calcium chloride, and ash were added to the spoil at a rate designed to reduce the sodium adsorption ratio in the surface 15 cm to 10 or less. The good-quality spoil (replacement soil) was then laid on the surface at rates of 0, 5, or 15 cm of material. The plots were seeded to a mixture of smooth bromegrass (bromus enermis leyss.), Crested wheatgrass (agropyron desertorum [fisch. Ex link] schult.), and alfalfa (medicago sativa l.). The addition of 5 of 15 cm of replacement spoil significantly improved vegetative growth on these sites. Chemical treatments had no effect on vegetative growth. Weathered ash showed no adverse effects on plant growth or soil properties.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 92-191691; Available for Reference At Bureau Libraries
North Dakota State University