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L SECTION 4:YEAR 4 TREE MONITORING RESULTS <br /> Lvalue is below the 80 percent survivorship criterion. Area D is the only planting sub area in <br /> Year 4 (2010) that failed to achieve this success criterion. <br /> 1 Similar to previous monitoring years,black willows had the highest mortality rate (6 trees <br /> recorded as dead) at this site.Three box elder and two valley oak also died (Appendix A). <br /> L The willows and box elder may still have alive root-stock, and could resprout from the <br /> base,but this cannot be determined at this time. <br /> L The average percent survivorship in this planting area in Year 4 (2010) was 78 percent, <br /> slightly lower than the previous monitoring year (2009) survivorship rate of 80 percent <br /> (Table 4-2).Tree survivorship in 2008 was 82 percent,slightly exceeding the success <br /> criterion. In 2007, survivorship was 78 percent,below the 80 percent survivorship success <br /> criterion. <br /> The average health and vigor score in this planting sub area in Year 4 (2010) is 1.6. This is <br /> ? slightly lower than the Year 3 (2009) score of 1.7 and is also the lowest score recorded in any <br /> L of the planting sub areas in Year 4 (2010).The Year 4 (2010) score of 1.6 corresponds to a <br /> little more than halfway between"law' and"medium' ranks.The health and vigor scores <br /> for this planting sub area in monitoring Years 1 and 2 (2007 and 2008)were also low (1.5 and <br /> 1.4) (Table 4-2). <br /> L <br /> d <br /> L <br /> L <br /> L <br /> L <br /> L <br /> L <br /> L . <br /> SAC11667491103500001(YEAR4-2010_HOLTTREE MONITORING_REPORT-FINAL.DOC%) 4-9 <br />