Class diagrams and collages

Class - sketchup model

Class 041813

BOOM

Iterations

Tree farm

30 feet tall can be used for landscaping - live oaks 8-12 years old

Reach economic maturity 20" in diameter 4 1/2 ft above ground - 60 -90 years

10 ft every 10 years -60 feet tall

25' - 10 to 20 years old

keep fairly dense til bottom 20-25 ft of stems are free of live branches
trees 40-50 feet tall
30-45 years
http://www.extension.umn.edu/distribution/naturalresources/dd5938.html

Oak stands managed for timber should be kept fairly dense until the bottom 20 to 25 feet of the stems are essentially free of live branches. This generally will occur when trees are 40 to 50 feet tall (30 to 45 years old). At this stage thin stands to stimulate diameter growth of crop trees.

Release no more than 100 crop trees per acre. Ideally, crop trees should be 20 to 25 feet apart. However, if they are scarce or unevenly distributed, you can leave two trees as close as 10 feet as long as you treat them as one tree when thinning.

Remove trees with crowns that encroach on those of crop trees (Figure 5). Free all sides of sapling and small poletimber size trees and at least three sides of larger trees. Trees below the main canopy will not affect crop tree growth, but you may cut them if they are marketable. Do not damage crop tree stems and roots while thinning stands. Repeat thinning every 15 to 20 years.