Cruising Methods

Question 1

Counting and Measuring

Answer 1

Measure trees are those in which all of the required tree measurements are taken and recorded

Count trees are those that are simply counted or tallied without having measurements taken on them

Question 2

Plot monumentation

Answer 2

Plot center must be specified precisely enough so that it can be unquestionably determined whether any particular trees are in or out

All trees that are in a plot should be marked in some way and any information painted on the measure tree in a plot will be applied to the side of the tree facing plot center

Question 3

Stratification

Answer 3

The division of a set of things into groups of similar things

Example: trees might be stratified by species and diameter and trees from a particular set of species and from a specific diameter range might be grouped into one sub-population

Question 4

Strata and Sample Group

Answer 4

Strata are usually used to separate the population by diameter range or cutting unit

Sample groups are usually used to separate population by species and product

The combination of a stratum and a sample group defines a sub-population for the cruise

Question 5

Tree-based Cruise Methods

Answer 5

Every single tree that is to be include in the volume estimate is visited by the cruiser and is counted.

Tree-based cruising methods are primarily used with cut-tree marking

Question 6

Area-based Cruise Method

Answer 6

Some sort of plot system is used to determine which trees will be counted and measured

Fixed plot, point, and point count measure tree

Question 7

100 Percent

Answer 7

All trees in a sub-population are a measure tree so there are no count trees in this method.

This is usually used in small areas like a landing or road

Question 8

Sample Tree (STR)

Answer 8

Specific portion of the trees in the sub-population is measured.

Example: A sampling interval of 1:10 would mean that every one of ten trees in a population would be measured, and the remaining trees are tallied as count trees.

Question 9

Fixed Plot

Answer 9

Average volume per acre is calculated and that volume per acre is multiplied by the total number of acres to ger the total volume

Every tree on every plot is measured so there are no count trees
Fixed plot sizes and the plot radius are determined by using a table

Question 10

In tree

Answer 10

A tree is considered in if the horizontal distance from plot center to the center of the tree at breast height is less than or equal to the plot radius