Lec 18 - Wood and Wood Products Flashcards
wood once used in
golf clubs and hockey sticks
tree:
erect, single stemmed woody plant that can exceed 6m in height
tallest tree + info:
Coast redwood in californa (115.7m)
tree can stand due to
secondary trees
for a tree to grow in girth, it must be capable of producing
“secondary growth”
are bamboo and banana trees? why?
no. because no secondary growth occurs in monocotyledonous plants
the ____________ is required for secondary growth
lateral meristem vascular
vascular bundles present:
- fasicular cambium and interfasicular cambium fuses
- vascular cambium grow and form to inside and outside
wood:
a combo of xylem vessels, tracheids,divers and parenchyma
how do rings occur in wood
- since wood produced is older than spring wood vs summer wood
- due to less water, less cell growth, means smaller rings
- ## new cylinders of secondary zylem a year produced
heartwood cant transfer water due to
resin which prevents decay
dendrochronology
the study of tree rings
- rings with living trees are matched with fallen trees to produce a record
who does dendrochronology work?
a tool is punched into the tree, a cork is retrieved so the rings can be counted
dendroclimatology used to determine
- if droughts occurred in cyclic patterns
- indicates impact of pollution, pests, forest fires, volcanoes, and earthquakes
wood hardness
relates to sturdiness of cell wall