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Table 12. Changes in Tree Density on Selected Oak-buckeye Savanna Units of Buckeye <br /> Ranch, 1940-1989. <br /> Unit Estimated Estimated Stems Change in <br /> Number Unit Sizel Per Unit 2 Stems/Unit <br /> Acres 1940 1963 1989 1940-89 <br /> 1 40.8 87 82 70 -17 <br /> 2 26.0 84 67 65 -19 <br /> 3 23.9 94 108 107 +13 <br /> 4 27.1 142 118 125 -17 <br /> 5 15.6 76 78 88 +12 <br /> 6 36.6 44 73 57 +13 <br /> 7 9.1 70 84 93 +23 <br /> 8 6.9 77 52 54 -23 <br /> 9 10.2 53 58 46 -7 <br /> 10 39.5 83 128 129 +46 <br /> 11 9.4 110 99 80 -30 <br /> 12 13.6 58 59 62 +4 <br /> 13 10.2 70 76 80 +10 <br /> 14 20.1 84 73 72 -12 <br /> 15 55.0 153 112 116 -37 <br /> Totals 340 1285 1267 1244 -41 <br /> 1 Estimated using a planimeter. <br /> 2 Estimated using 1:660 black and white air photo (Xerox copies). <br /> Buckeye Ranch Resource Plan (November, 1993) <br /> 161 <br />