Agenda - 08-10-1994 - Laserfiche WebLink

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TABLE 2.2.8 - INDICATOR SPECIES RATING Indicator Tree Species Mill Value* Rating Pine (Loblolly/Shortleaf) $150 1.00 Oak (Northern Red Oak) $135 0.90 Mixed Hardwood (Sweetgum) $85 .57 Note: * Value/1000 board feet of standing timber. Sources: 1/Timbermart South, July, 1990. 2/ Soil Survey of Orange County, and State Office, USDA, Soil Conservation Service Steepness of Slope Rating:In many cases, slope steepness is one of the most important factors limiting forest management activities or making them more costly. Table 8 lists slope classes for Orange County in order of increasing limitation for forest management. A rating of 1.00 is assigned to the slope class (0-6%) with the least limitation to management. Ratings assigned to other slope classes are relative to the lowest slope class (15-45%) in terms of cost management. As an example,the 0-6 percent slope class is rated 1.00.The 15-45 percent slope class is rated 0.50, because it costs approximately 50 percent more to harvest trees on such slopes (1.00 x 0.50 = 0.50, and 1.00 - 0.50 = 0.50). Since there is roughly a "straight line" relationship between harvest cost and slope, the 6-15 percent slope class is rated as 0.75. TABLE 2.2.9 - STEEPNESS OF SLOPE RATING Slope Percentage Rating 0-6 1.00 6-15 0.75 15-45 0.50 Source: Soil Survey of Orange County, NC, USDA, Soil Conservation Service Appendix E lists Orange County soils from the flattest to the steepest according to slope.The list served as the basis for the slope ranges identified in Table 2.2.9 above. Soil Limitations Rating: In this rating, soil features, other than slope, that limit management activities or make them more costly are evaluated. Soil characteristics that limit forest management activities were derived using a system of ordination symbols which identify woodland suitability. The first part of the ordination symbol, a number, indicates the potential productivity of the soils for important trees. The number 1 indicates very high productivity-, 2, high; 3, moderately high; 4, moderate; and 5, low. The second part of the symbol, a letter, indicates the major kind of soil limitation. For Orange County, the limitations are few but important.The letter w indicates excessive water in or on the soil; c, clay in the upper part of the soil; and r, steep slopes. The letter o indicates insignificant limitations or restrictions. Ordination symbols for Orange County soils are shown in Appendix E.The major limitations,other 2.2.16