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Ovoga
Ovoga (Poga oleosa)

Family: Rhizophoraceae

Common names: Afo, African brazil nut, Angale, Avoga, Bonyor, Ekom, Emyu, Enoi, Ikoi, Iku, Imono, Imonon, Imonor, Inoi, Inoi nut, Inoye, Inyere, M'poga, M'pongoue, Mfo, Mpfo, Mpoi, Muguba, Muleko, Ngale, Njole, Njove, Nyare, Nyore, Okeco, Onyo, Ovoga, Ovovo, Pobo, Poga, Poga enoi

Distributed in: Cameroon, Congo, Gabon, Guinea, Nigeria, Zaire (Africa)

Distribution overview: The species occurs from south-eastern Nigeria to Gabon. It is found in evergreen forests and on abandoned farmlands.

Common uses: Bent Parts, Boat building (general), Boxes and crates, Cabinetmaking, Canoes, Carvings, Casks, Chairs, Chests, Decorative veneer, Desks, Dining-room furniture, Drawer sides, Excelsior, Figured veneer, Fine furniture, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Joinery, Kitchen cabinets, Light construction, Living-room suites, Moldings, Musical instruments, Office furniture, Packing cases, Paneling, Plywood, Pulp/Paper products, Radio - stereo - TV cabinets, Rustic furniture, Stools, Turnery, Utility furniture, Vats, Veneer, Veneer: decorative, Wardrobes, Woodwork

Environment profile: Vulnerable

Tree size: Tree height is 30-40 m

Colors: the heart isRed, Redand the sapwoodWhite to yellow, White/Gray .The grain isWavy, the textureMediumand the lusterLustrous

Natural durability: The standing tree is susceptible to attack by Longhorn beetles., Very little natural resistance

Odor: No specific smell or taste

Kiln Schedules: Drying (speed) is fast

Drying Defects: Slight surface checking, Slight twist/warp

Ease of Drying: Thick Stock Requires Care

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: Moderate

Boring: Good boring qualities

Carving: Good results

Cutting Resistance: Easy to saw

Gluing: Good gluing properties

Mortising: good

Moulding: Moulds easily with ordinary tools

Movement in Service: Moulds easily with ordinary tools

Nailing: Holds nails well, Very Good to Excellent

Planing: Planes well, to a good finish

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Routing recessing: Fairly good response to preservative treatment

Sanding: Fairly good sanding characteristics

Veneering qualities: Easy to cut, Suitable for slicing

Steam bending: Good

Screwing: Screwing yields good results, Very Good to Excellent Results; Turning: Fairly Easy to Very Easy

Painting: Satisfactory; Polishing: Wide rays make polishing difficult ; Staining: Fairly Easy to Very Easy; Varnishing: Satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,34 0,39
Density 432 kg/m3
Bending Strength 511 723 kg/cm2
Crushing Strength 219 372 kg/cm2
Hardness 298 kg
Impact Strength cm
Shearing Strength 62 kg/cm2
Stiffness 75 80 1000 kg/cm2
Tangential Shrinkage 8 %
Radial Shrinkage 2 %
Weight 416 352 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 7275 10290 psi
Density 27 lbs/ft3
Hardness 657 lbs
Maximum Crushing Strength 3126 5291 psi
Shearing Strength 882 psi
Stiffness 1074 1147 1000 psi
Specific Gravity 0.34 0.39
Weight 26 22 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 8 %
Volumetric Shrinkage 13 %

Density (dry weight) = 23-30 lbs/cu. ft. 1
Bending strength (MOR) = low
Shrinkage, Tangential = moderate
Modulus of Elasticity (stiffness) = very low
Max. crushing strength = medium
Max. crushing strength = low
Bending strength (MOR) = medium
Shrinkage, Tangential = large
Hardness (side grain) = very soft
Hardness (side grain) = soft
Shrinkage, Tangential = fairly large
Shearing strength (parallel to grain) = very low
Density (dry weight) = 31-37 lbs/cu. ft.
Weight = moderate
Shrinkage, Radial = large
Shrinkage, Radial = fairly large
Modulus of Elasticity (stiffness) = low
Density = medium
Compression strength (parallel to grain) = low

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.48Banks, C.H.,1954,The Mechanical Properties of Timbers with Particular Reference to those,grown in the Union of South Africa,Journal of the South African Forestry Association,No. 24 pp.44-65,[South,African Forestry Journal]Bois et Forets des Tropiques,1950,Ovoga - Poga oleosa,Bois et Forets des Tropiques,No.14, pp145-8Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchChudnoff, 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 DepartmentFrance - C.T.F.T./C.T.B.,1982,Guide pour le Choix des Essences Deroulables-pour la fabrication du,contreplaque,C.T.F.T./C.T.B. FranceFrance - C.T.F.T.,1966,Bois Tropicaux,C.T.F.T. Publ.,12France - Comite Nacional des Bois Coloniaux,1931,Etude Physique et Mecanique des Bois Coloniaux,Assoc. Colonies-Sciences & Comite National des Bios Coloniaux, Paris,,FranceGutierrez Oliva, A., Plaza Pulgar, F.,1967,Caracteristicas fisico-mecanicas de las maderas Espanolas. (Physical and,mechanical properties of Spanish timbers.,Min.Agric./Dir.Gen Montes/Instituto Forestral de Investigaciones,y,Experiencias, Madrid pp102Hedin, L.,1930,Etude sur la Foret et les Bois du Cameroun,Haut-Commissaire de la CamerounHughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataJaping, H.W.,1957,Tests about the most important mechanical and physical properties of 41,Surinam woods,Konin. Institut voor de Tropen,Amsterdam Meded,122 (Afd.,Trop.,Prod.46)Jay, B.A.,1968,Timbers of West Africa,TRADA, Red Booklet SeriesKeay, R.W.J.1989. Trees of Nigeria.Revised Version of Nigerian Trees . Clarendon Press, Oxford.Keay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanKennedy, J.D.,1936,Forest Flora of Southern Nigeria,Government Printer LagosMeniaud, J., Bretonnet, F.,1926,Les Bois Coloniaux d'Afrique dans l'Industrie,Publ. de l'Agence Gen. des ColoniesSallenave, 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.23Takahashi, 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. London
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