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Number 1. This rule tends to favor the buyer of logs that are less than 28" in diameter because more lumber can usually be cut from trees of this size than the formula indicates. This rule is mostly used for the purchase of sawtimber and sawlogs.
Correct Answer: Doyle Rule
Number 2. This rule is favored by forestry agencies such as the USDA Forest Service. The rule estimates the amount of 1" lumber that can be sawn from logs of certain dimensions. The rule also is used mostly for the purchase of sawtimber and sawlogs.
Correct Answer: Scribner Rule
Number 3. This rule is said to be one of the most accurate volume tables used in the United States. This rule, unlike the other two, takes into account the amount of wood taper of the log from the small end to the large end. (If we look at a tree we notice that the tree is larger in diameter towards the base of the tree and it tapers or gets smaller as we look up the tree.)
Correct Answer: International