Stratification And Plotting

Question 1

What is important to remember about standards unit?

Answer 1

Legally bound to site plan stocking standards

Can be stratified, but not combined unless someone amends site plan

Question 2

What’s the smallest stratum size?

Answer 2

1 ha in stocking survey, but up to 2 ha in FG survey.

Question 3

What differentiates standard units?

Answer 3

Typically site series. Tree species can also have an effect

Question 4

What are some reasons to stratify?

Answer 4

Stocking

Leading inventory Spp

age class

Height class

CC

SI

Treatment recommendations

Stand structure

Question 5

What is the most critical step to surveying?

Answer 5

Stratification: the process of defining and identifying populations with similar characteristics within an opening.

Stratum is subset of standard unit

Question 6

Why should you stratify before as a pose to after surveying?

Answer 6

Might not achieve minimum plots for each stratum if you don’t.

Easier to draw the boundary while you are on the block.

Question 7

What are the 4 ways to survey a block?

Answer 7

Grid

Vector (predetermined paths in a logical direction)

Representative

Occular

Question 8

What are some minimums to keep in mind?

Answer 8

• 5 plots per stratum
• max 1.5 plots per ha (waives standard error)
• should distribute plots evenly with a plot representing each area

Question 9

Why do we only count to the M-value

Answer 9

To reduce variation and avoid needlessly lowering our confidence level.