211-258 Wood Science

Credit Points

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.

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 JG & Bowyer JL, Forest Products and Wood Science: an Introduction. 2nd edition, Iowa State University Press.