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have often been included in seed mixes as nitrogen— fixers, due to the lack of suitable and available native <br />nitrogen- fixers. <br />If the total cumulative number of native species in the reclamation sampling exceeds the average number <br />of native species per 100 sq.m. in the weighted average of the reference area sampling, then Test D is <br />passed. <br />Woody Plant Density Evaluation <br />The location of woody plant concentration areas in BRB -5 were documented by field mapping and <br />assisted by aerial photography (Routt County DOQQ 2009) in the Summer of 2010. During the mapping, <br />"High" density was reserved for those areas apparently (visually) greater than or equal to 1000 shrubs per <br />ac (one quarter shrub per sq.m.; 25 shrubs per 100 sq.m.). All other portions of the BRB -5 were labeled <br />as "Background" density. <br />Quantitative density data from fifty randomly located samples within the mapped woody plant <br />concentration areas were gathered from belt transects located and oriented randomly. In the Background <br />woody plant density portions of BRB -5, thirty sample points, in conjunction with cover and /or production, <br />were located and sampled for woody plant density. The belt transects (i.e. elongate sample plots) were 2 <br />m x 50 m in dimension and randomly oriented from the origin. Within each belt transect, all living trees <br />and full shrubs whose root crowns emerge within the plot boundaries were counted by species. Sample <br />adequacy of the collected woody plant density data from the BRB -5 was determined as follows: <br />(St)2 <br />nmin = ----------- <br />(dX)2 <br />where: <br />nmin = the number of sample points needed in a given vegetation type to be capable of detecting a 15% <br />reduction in the mean with 90% confidence; <br />s = standard deviation (n -1); <br />11 <br />