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= for field data collection involved the use of a 50-meter type and a <br />- standard 10-point frame. Transects were located using a numbered grid <br />"~~ system which was superimposed onto the existing vegetation map. Numbers <br /> were randomly taken from a random number table to obtain the coordinates <br /> for the vegetation transects. This location was then marked on a field <br /> work map. Once the sampling crew had arrived at the designated field <br /> site. a random number was obtained which corresponded to the 8 sna~or <br /> compass bearings (N, NE, E, SE, S, etc.). The orientation of the 50- <br />C: <br /> meter tape was then made. While the crew chief was stretching the tape, '_ <br /> the recorder obtained five more random numbers between 0 and 51 which <br />~~~ were the points at which cover and production were taken. Shrub density <br />_- was obtained by counting all shrubs rooted within 1 meter of the 50- <br /> meter tape. <br /> At each designated interval, the 10-point frame was read on each side of <br />- the tape which yielded a total of 100 hits per transect. Production was <br /> taken at the 5 points along the transect. All herbaceous species rooted <br />~ <br />~ within a circular :meter hoop were clipped at ground level, placed in <br />_ <br />• individual paper sacks and dried in a drying oven. The dried samples <br /> <br />: were then weighted on a beam balance to an accuracy of one tenth of a <br />z.`: <br />- <br />gram. <br />- To expedite sampling, approximately 4 or 5 transects were run on the . <br />- pre-shine and reference area sites of both vegetation types. These <br />= transects were then used to determine the adequacy of the sample size. <br />_ <br />•- If the sample size had been achieved, no additional transects were run. <br /> If additional transects were needed, field data was collected until the <br />== 80 percent level of accuracy had been achieved. <br /> .Statistical methods used to determine sample size and similarity between <br />- the pre-mine and reference areas are those proposed by the Office of <br /> Surface Mining in their publication entitled, "A Statistical Evaluation <br />__ <br />_ 2 ,, <br />._. ~ A ~ ~ Ixc. ' ~ <br /> _.__ _. <br /> <br />