Recommendations concerning inventory of timber, fuelwood, and nontimber products and charcoal species regeneration

Appendix C. Calculations of proportions of wood volume in fagots

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• St Dev of Proportions Coefficient of Variation for the species CHARCOAL
• 131 SAWTIMBER
• Species No. of trees in sample Avg Stump Ht (cm) StDev of Stump Ht

Appendix C. Calculations of proportions of wood volume in fagots Species Avg value for Proportion of Fagot Vol to Total Vol Number of trees in calculation St Dev of Proportions Coefficient of Variation for the species CHARCOAL Anogeissus leiocarpus 0.373 3 0.0299 8% Combretum glutinosum 0.344 43 0.1494 43% Combretum nigricans 0.619 1 Hexalobus monopetalus 0.310 19 0.1232 40% Piliostigma thonningii 0.362 10 0.1363 38% Strychnos spinosa 0.662 9 0.1852 28% Terminalia avicennioides 0.329 23 0.1346 41% Terminalia macroptera 0.359 23 0.1427 40% 131 SAWTIMBER Bombax costatum 0.150 37 0.0777 52% Cordyla pinnata 0.184 32 0.0940 51% Erythrphleum guineense 0.167 23 0.1071 64% Lannea acida 0.224 35 0.1445 65% Pterocarpus erinaceus 0.231 35 0.1507 65% Prosopis africana 0.188 20 0.0760 41% 182 N.B.: 125 cut trees had no “sections” to stack, only fagots. All trees had at least ONE fagot (up to 26 fagots, for sawtimber) to weigh. Species No. of trees in sample Avg Stump Ht (cm) StDev of Stump Ht CV of Stump Ht Avg Height (m) Avg Length (m) CHARCOAL Anogeissus leiocarpus 4 25 9.95 38.62% 9.63 9.78 Combretum glutinosum 73 16 7.99 47.90% 7.74 8.22 Combretum nigricans 2 11 5.66 51.43% 4.65 5.55 Hexalobus monopetalus 40 14 8.51 59.21% 5.82 6.24 Bauhinia thonningii 22 16 8.59 53.66% 5.68 6.15 Strychnos spinosa 31 10 4.58 41.90% 4.36 4.83 Terminalia avicennioides 40 16 8.06 49.81% 5.09 5.56 Terminalia macroptera 30 14. 6.90 49.64% 9.43 9.71 SAWTIMBER Bombax costatum 39 44 25.98 58.61% 12.85 13.29 Cordyla pinnata 35 30 14.97 48.38% 11.36 11.53 Erythrphleum guineense 23 28 17.14 59.29% 15.22 15.35 Lannea acida 38 19 10.37 52.82% 9.01 9.68 Prosopis africana 25 27 15.14 56.09% 11.56 11.32 Pterocarpus erinaceus 37 31 15.88 51.13% 12.34 12.62 Поделитесь с Вашими друзьями: