Intro Flashcards
2 most common types of surveys
- Stocking (Regen delay)
- Free Growing (not free to grow).
2 major reasons to survey?
Provides standard information for planning of future activities, assess cost/values of stand and overall operation. Allows gov’t to evaluate the state of crown forested land.
Proves completion of legal obligation to restock
(Regen Delay and Free Growing).
What is Regen delay?
The maximum time after harvesting before an area must be occupied by a specified minimum number of preferred/acceptable, well-spaced trees. This is specified in Site Plans, SP’s and PHSPs.
Early vs Late Free growing?
Early Free Growing Date is the earliest a free growing assessment can be made that determines a healthy crop of preferred or acceptable well spaced trees are of a minimum height and free of competing vegetation. Somewhat flexible.
• Late Free Growing Date is the latest a stand can be declared Free Growing without the licensee incurring a penalty.
What defines a well spaced tree?
At least the MITD from the next WS (well spaced tree) in plot. Must be preferred or acceptable spp. Free of forest health issues and sometimes minumum height.
What signifies harvest commencement?
When the first tree is cut, regardless of how long logging takes.
5 steps in office associated with surveys
- Office review
- Walk through
- Gather data
- Summarize data
- Prepare report
What things would u want to know before doing a survey?
Survey standards
Stocking standards
Previous treatments
Forest health
Why do we survey?
Surveying is done to prove your prescription decisions. Takes a small number of plots and extrapolates to obtain stand volume.
What can you do to declare free growing on a site with a large patch of acceptable but not preferred species.
Amend by stratifying and indicating that the non preferred species patch is a different site series.
What is the point of stratifying?
Stratification allows us to ultimately put less plots in to acheive a desired sample intensity.
