211-258 Wood Science

Credit Points

HECS Band

Coordinator

Semester

Contact

Subject Description

On completion of this subject, students should: be able to describe the macroscopic and microscopic features of hardwood and softwood xylem and phloem; comprehend information regarding variability of wood; understand methods used to identify timbers; describe the processes of wood and bark formation including cell differentiation, cell wall layering and modifications; understand the effects of cell wall organisation on some wood properties; have a basic understanding of the chemical composition and properties of wood; understand anatomical, chemical and physical characteristics associated with heartwood formation, growth stresses, reaction wood and natural features in wood; comprehend the meaning of a number of wood physical properties and basic wood-moisture relationships. Subject content includes: wood and bark structure, anatomy and ultrastructure; Macroscopic and microscopic features of wood; Tree growth and wood quality, woody cell development, reaction wood, variability of wood; Identification methods, growth rings and measurement of wood properties; Wood chemistry, extractives, collapse; Chemical utilisation of wood; Engineering properties of wood; Natural characteristics, and physical properties of wood.

Half the practical time will be devoted to wood anatomy, and half to wood physics, chemistry and adhesives.

Assessment

One 3-hour written examination at the end of the semester. Practical tests may be given throughout the semester. Marks may also be given for assignments, projects and practical work.

Prescribed Texts

• Haygreen J G & Bowyer J L, Forest Products and Wood Science: An Introduction. 2nd ed, Iowa State University Press.