CGNF Flashcards
in a 12 m plot how many stems per hectare?
10 trees = 500 sph (each tree = 50 stems per hectare)
What does EUS stand for?
End use sort
What is the hierarchy at the end use sort
Lumber Peeler S/L Gang PW Utility Pulp
What are the different grades and the end use sorts that they represent.
Grades vs Sorts DF=Lumber BC = PLR H/I = Sawlog J = Gang U = Utility X = Utl Y = Pulp
The species and product distribution of a stand is important because…
It impacts the value of the stand.
What is call grading?
Cruiser assigns log quality classification to individual trees based on scaling grades.
What is net factoring?
Cruiser assigns lumber recovery estimate to timber based on scaling rules.
What are loss factors?
What size inventory are they designed for?
The traditional way of estimating volume based on decay factors with broad averages.
- Designed for large inventories
What are the advantages of CGNF over loss factors?
Reflects regional timber conditions
Reflects individual stem conditions
Reflects log conditions
What is the difference between Call grade net factoring and scaling?
CGNG - log length not defined - have to estimate DIB from DBH - top diameter estimated - losses can be hidden - top logs at a distance SCALING - ends exposed ( DIB and rot evident ) - log on ground - more accurate
What are the 2 log length systems in CGNF?
Variable length and Fixed lengths
What are the attributes of the variable length system?
Log length defined by grade breaks
Min lengths
Captures log quality
primarily used for Inventory
What are the attributes of the fixed length system?
- Log by preferred lengths
- Reflects changing product preferences
- Primarily used for appraisal
What is grade net factoring?
Assigning value to a stand
What is the purpose of late rotation fertilization?
gives contractor the opportunity to reduce rotation age
