Growth History  - (See TREE PITHY POINTS, SHIGO, 1999, pg123)  A look at page 123 in Tree Pithy Points will help to understand growth.  Wounds are all too common on trees growing in cities, parks, forests, and orchards.  The young Monterey pine in New Zealand was wounded during a thinning operation.  You can note the thick woundwood that formed to the sides of the wound.  Dissection shows clearly the growth history of the tree. 
(See TREE ANATOMY, SHIGO, 1994),
(See TREE PRUNING, SHIGO, 1989),
(See A CLOSER LOOK AT TREES, SHIGO "video"),
(See A NEW TREE BIOLOGY, SHIGO, 1986),
(See MODERN ARBORICULTURE, SHIGO, 1991).

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