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M <br />Table 5 <br />Productivity Rating <br />Productivity Range <br />(Cubic Feet /Acre /Year) Rating <br />1 2 <br />166+ 1.00 <br />121 -165 0.87 <br />79 -120 0.60 <br />51 -78 0.39 <br />21 -50 0.22 <br /><20 0.00 <br />---------------------------------------------------- <br />Notes: 1/ See Appendix D. <br />Source: Soil Survey of Orange County, NC and <br />National Forestry Manual <br />USDA, Soil Conservation Service <br />Indicator Species Rating <br />This rating is based on the value of the indicator species <br />that occur in the county. Table 6 below lists the various indicator <br />species in order of decreasing value for.the major wood product in <br />the area, building timber and firewood. <br />Table 6 <br />Indicator Species Rating <br />--------------------------------------------------- <br />Mill <br />Indicator Tree Species Value Rating <br />1 2 3 <br />Pine (Loblolly /Shortleaf) $150 1.00 <br />Oak (Northern Red Oak) $135 0.90 <br />Mixed Hardwood (Sweetgum) $85 0.57 <br />Notes: 21 Value 11000 board feet of standing timber. <br />Source.: Timbermart South, July, 1990. <br />-.Soil Survey of Orange County, NC,. and <br />-State (Raleigh) Office, USDA <br />= 1 Conservation Service <br />The most valuable indicator is always assigned a rating of <br />1.00. The ratings for other species are relative values determined <br />by dividing mill value of the next indicator species by the mill <br />value of the most important species. For example, the indicator <br />species oak has a mill value of $135, and it is assigned a rating <br />of 135/150 or 0.90. The indicator species mixed hardwood has a mill <br />value of $85, and it is assigned a rating of 85/150 or 0.57. <br />