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NYATOH (Madhuca motleyana)
Trade Name
Nyatoh
Scientific Name
Madhuca motleyana (de Vriese) J.F. Macbr.
Family
Sapotaceae
Common Names
Padang; Njatuh; Ketiau; Balam terung (Netherlands); Nyatoh (Indonesia); Balam (Indonesia); Nyatoh (Germany); Nyatoh (Sweden); Nyatoh (Italy); Nyatoh (Spain); Nyatoh (France); Nyatoh (United States of America); Tanjungan (Indonesia); Riam (Sarawak); Nato (Philippines); Sodu-sodu (Indonesia); Nyatu (Borneo); Nyatoh (United Kingdom)
Scientific Name Synonyms
Ganua scortechinii (King & Gamble) H. J. Lam; Ganua motleyana (de Vriese) Pierre ex Dubard
Description Of The Tree
Botanical Description
It is a medium sized to large tree, up to 40 m tall, with a columnar bole up to 100 cm of diameter. The buttresses are absent or small, sometimes with pneumatophore roots.
Natural Habitat
Madhuca motleyana is common in freshwater and peat swamp forests, generally near the sea level.
Non Timber Uses
The fat present in the seeds is used for human consumption.
Wood Identification
Anatomic Description Of Wood
Vessels in diagonal and/or radial pattern. Vessels in radial multiples of 4 or more common. Tyloses common. Vessels per mm2 5 to 20. Vessel-ray pits reticulate and/or foraminate. Vascular/vasicentric tracheides present. Simple perforation plates. Axial parenchyma in narrow bands on lines up to 3 cells wide. Rays more than 10 per mm (abundant). Rays exclusively uniseriate. Silica bodies in the ray cells. Fibers very thick walled.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The wood is yellowish brown in color.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
The grain of Nyatoh is reported to be straight to shallowly interlocked.
Texture
This species is usually reported to have a fine texture.
Luster
The wood of M. motleyana is occasionally glossy.
Natural Durability
It is reported to be prone to termite and fungal attack, but resistant against powder-post beetles.
Natural durability index (1= Very high durability, 7=Vey low durability)
3
Silica Content
Silica Content: Silica is present. Amounts over 0.05% may affect wood processing. Silica Value: 0
Resistance To Impregnation
It is very resistant to preservative treatment, with very low absorption of preservatives.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.56
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.62
Total shrinkage Tangential (Saturated to 0%MC) (%)
5.4
Total shrinkage Radial (Saturated to 0%MC) (%)
4.3
Drying Defects
Ease of Drying: Drying is reported to be slow. Drying Defects: Degrade is reported to be severe in the border zone between the heartwood and the sapwood. Kiln Schedules: Recommended kiln schedule is C, but drying may not be satisfactory even with this mild schedule.
Recommended Dry Kiln Schedule
UK-E
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.3
Wood Chemical Properties
Wood Mechanical Properties
Workability
Sawing
Cutting resistance is generally low.
Rotary Veneer Cutting
This species peels and slices well if steamed.
Sliced Veneer
This species peels and slices well if steamed.
Machining
It is difficult to machine when interlocked grain is present.
Planing
This species is easy to plane.
Boring
Boring operations are rather difficult.
Nailing
This wood is difficult to nail. Pre-boring is recommended.
Gluing
This species glues well.
Finishing
It gives a good finish.
Staining
It has a good staining.
Polishing
Polishing of this species is reportedly easy.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, flooring, parquet, frames, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, SPORTS, PACKING, pallets, NAVAL CONSTRUCTION, boat deck, OTHER AND MUSICAL INSTRUMENTS
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Frames
- 16 - Woods of the World
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Sports
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Pallets
- 48 - The strength properties of timbers
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boat Decking
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Other & Musical Instruments
- 63 - Madeiras do Brazil II
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