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NON-IRRIGATED PLOT" <br />the non-irrigated plots included both seeded and undisturbed plots. <br />Those seeded were mulched with either straw or manure at if tons~acra, and <br />the undisturbed plots provide a small reference azea of native vegetation <br />where the sand sage was reduced first by moxing and secondly by spraying <br />xith an herbicide. Herbaceous cover xas sampled September 6, 1978, and <br />July 25, 1979. with results as follows for perennial species: <br />Year Straw Manure Native <br />1978 z 3 20 <br />1979 2 2 12 <br />In addition to the cover of perennial species, the seeded plots had an <br />average of 10~ cover of annual species and the native of ,just ?,'~. These <br />data shox seeding failure without irrigation; although ue believe that <br />cool-season grasses such as smooth bromegrass and crested uheatgrass could <br />be established quite consistently by drilling into prepared seedbeds in <br />March. 'darn-season grasses (especially prairie sandreed, sand bluestem <br />and blue grams) are the most important native grasses to be established <br />after mining. <br />(~ <br />• <br />9 <br />