Ecological Studies on the Revegetation Process of Surface Coal Mined Areas in North Dakota. 5. Plant Production on Spoils and Topsoils as Affected by Time and Amendments.
NTIS: PB/83-171363 :67 pages
Field study sites were established on recontoured mined areas during the early 1970's in which several amendments were tested for their ability to imrpove spoil-topsoil conditions and, hence, increase plant production. A number of grass and legume species combinations were studied. The general effects of one-time, single-rate application of leonardite and/or slack coal to spoils and topsoils was the reduction of grass dry matter yields and the promotion of legume establishment and yield. Production of weedy species was remarkably lower on topsoil treated with leonardite than that without leonardite. The general effect of commercial fertilizer applied one time prior to seeding was to increase plant production during the first 2 to 3 years after which the effect disappeared; the effect was much more pronounced on spoils. Weedy species accounted for most of the biomass production during the first growing season.
CP; Final Contract Report;
NTIS Accession No.
University of North Dakota