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Two permanent plant composition plots were marked with conduit in each of the 64 plots. Canopy cover was recorded in a 5 m2circular area surrounding each of the plots. At approximately 5-year intervals, coverage is assessed in late July, using visual estimates of cover by species, based on a modified Daubenmire scale. NOTE:In 1989, sampling was done once in early July after mowing using one 10 m2 plot placed randomly in the approximate center of each plot.