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Oboto (Mammea africana)
Family: Guttiferae Common names: Aborzok, Aborzole, Abotoasebie, Abotzok, Abrompesowa, African apple, African apricot, African mammea apple, African mammy apple, Apegya, Bastard mahogany, Bjimbo, Bletui, Bletune, Bokoli, Boliki, Bompegya, Boza, Djimbo, Duforokoto, Ebornzork, Ibeka, Ibelea, Kaikumba, Libu, M'bossi, M'boza, Mammea, Muboro, Oboto, Oligbomidu, Ologbomodu, Ooboto, Pasin, Passee, Pegya, Tshilungu Distributed in: Angola, Cameroon, Central African Republic, Congo, Gabon, Ghana, Ivory Coast, Liberia, Madagascar, Nigeria, Sierra Leone, Uganda, Zaire (Africa) Distribution overview: Found in mixed deciduous forests from Sierra Leone to Angola and Zaire, prefers rather wet environment and sometimes forms small stands on flood plains. Common uses: Barge fenders, Bent Parts, Boat building (general), Bridge construction, Building construction, Building materials, Cabin construction, Cabinetmaking, Chairs, Chests, Construction, Crossties, Decorative plywood, Desks, Dining-room furniture, Docks, Dockwork, Domestic flooring, Drawer sides, Excelsior, Factory construction, Fine furniture, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, General carpentry, Harbor work, Hatracks, Heavy construction, Interior construction, Interior trim, Joinery, Kitchen cabinets, Light construction, Living-room suites, Marine construction, Millwork, Mine timbers, Naval architecture, Office furniture, Parquet flooring, Piling, Plywood, Posts, Railroad ties, Turnery, Vehicle parts, Veneer: decorative Product sources: Compared to some of the popular imports, supplies are rather limited through normal retail channels, but available quantities are more than adequate. Price is in the moderate range. Environment profile: Data source is World Conservation Monitoring Center
In Uganda it is Rare and it is Vulnerable in Cameroon and the Ivory Coast
Tree size: Tree height is 20-30 m
Colors: the heart isRed, Reddish brownand the sapwoodRed, Well defined.The grain isTangential surfaces show black speckles , the textureMedium coarse to coarseand the lusterSlightly lustrous
Natural durability: Susceptible to insect attack, Very durable Odor: No specific smell or taste
Kiln Schedules: Dry at a slow speed
Kiln Drying Rate: Naturally dries slowly
Drying Defects: Moderate end spitting, Moderate twist/warp Ease of Drying: Slowly Tree Identification: Bole/stem form is straight Comments: General finishing qualities are rated as satisfactory Blunting Effect: Medium effect due to high mineral content Cutting Resistance: Fairly Difficult to Very Difficult to saw Gluing: Easy to glue
Mortising: Finishes well Moulding: Easy to mould
Movement in Service: Easy to mould
Nailing: Holds nails well, Possible if prebored Planing: Satisfactory planing properties Resistance to Impregnation: Resistant sapwood Response to hand tools: Fairly Difficult to Difficult to Work Sanding: High gum content may clog sandpaper
Veneering qualities: Diifficult to veneer, Exudes large amounts of gum if veneer is hot-pressed into plywood
Screwing: Possible if prebored, Screwing yields good results; Turning: Good results
Painting: Poor; Polishing: Very Good to Excellent;
Max. crushing strength = high 1 Bending strength (MOR) = high 0 Shrinkage, Radial = large Shrinkage, Tangential = large Density (dry weight) = 46-52 lbs/cu. ft. Modulus of Elasticity (stiffness) = medium Hardness (side grain) = medium Bending strength (MOR) = medium Shrinkage, Tangential = fairly large Shearing strength (parallel to grain) = medium Density (dry weight) = 53-60 lbs/cu. ft. Density (dry weight) = 38-45 lbs/cu. ft. Bending strength (MOR) = very high Weight = very high Shrinkage, Radial = fairly large Shearing strength (parallele to grain) = very high Shearing strength (parallel to grain) = high Resists denting and marring Modulus of Elasticity (stiffness) = low Max. crushing strength = medium Hardness = medium Hardness (side grain) = very hard Hardness (side grain) = hard Density = high Compression strength (parallel to grain) = very high Arno, J. 1989. Mammea africana - Oboto. In A Guide to Useful Woods of the World. Flynn Jr., J.H., Editor. King Philip Publishing Co., Portland, Maine. 1994. 224-225.Banks, C.H. and J.P. Schoeman. 1963. Railway Sleeper and Crossing Timbers. Bulletin No. 41, Republic of South Africa. The Government Printer, Pretoria, South Africa.Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchChalk, L.,1933,Twenty West African Timber Trees,Forest Trees and Timbers of the British Empire,Part 2Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFerreirinha, M.P.,1962,Madeiras de Angola - 2nd Series,Garcia de orta Lisbon,10 (1)Fouarge, J.,1950,Appropriation de Bois Congolais aux Besoins de la Metropole,I.N.E.A.C. Belgium Serie Technique,No.38Fouarge, J.,1953,Bois du Congo,I.N.E.A.C.France - C.T.F.T.,1961,Resultats des Observations et des essais Effectues au C.T.F.T sur Oboto,C.T.F.T. Information Technique,No.103Ghana - Timber Marketing Board,1969,Ghana Hardwoods,Timber Marketing BoardHughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataI.U.F.R.O.,1973,Veneer Species of the World,Assembled at F.P.L. Madison on behalf of I.U.F.R.O. Working Party on,Slicing and Veneer CuttingIrvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonJay, B.A.,1968,Timbers of West Africa,TRADA, Red Booklet SeriesKinloch, D., Miller, W.A.,1949,Gold Coast Timbers,Govt. Printer Gold CoastKryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159Lebacq, L., Dechamps, R.,1967,Contribution a un Inventaire de Forets du Nord-kasai,Musee Royal de L'Afrique Centrale Belgium Annals Series 8 No.5Man Mohan Singh, et al.,1977,A reappraisal of the suitability of Melia azedarach as a paper making new,material,Indian Forester 103(9) pp641-50Organisation for European Economic Co-operation,1951,African Tropical Timber (Nomenclature, Description,OEECPieters, A.,1977,Essences Forestieres du Zaire,R.U.G. Gent BelguimSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSallenave, P.,1964,Proprietes Physiques et Mecaniques des Bois Tropicaux (Premier Supplement,C.T.F.T. Publ.,no.23Stevens, W C,1961,Kiln Operators Handbook,HMSOTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Unwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. LondonWCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom.Wood, B., Calnan, D.,1976,Toxic Woods,British Journal of Dermat 94 Suppl. 13 |
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