CSS :: Sustained Yield Regulations

@ : Home > Forestry > Sustained Yield Regulations

What is increment?

A.	The increase in girth, diameter, basal area, height, volume, quality	B.	Value of individual tree or crops during a given period
C.	Utilizable portions of total woody growth goes on increasing	D.	All of the above

Variation of volume increment with age is:

A.	Current annual increment (CAI)	B.	Mean annual increment (MAI)
C.	Both (a) & (b)	D.	None of these

Current annual increment (CAI) means:

A.	Every year, the volume of a growing tree or of a stand of trees, increases by quantity	B.	But periodic annual increment after 5/10 years is taken to be CAI
C.	Both (a) & (b)	D.	None of these

Need of determination of increment means:

A.	Checking correctness of past management	B.	Checking silvicultural or management practices
C.	It also helps in finding rotation	D.	Decision about optimum level of residual growing stock. It depends on rotation
E.	All of the above

Measurement of increment of crop is:

A.	From yield table	B.	Estimation of movement rations from average diameter growth by diamerter class
C.	Increment determination by control method	D.	Increment by continuous forest inventory (CFI)
E.	All of the above

From yield table we determine:

A.	Future increment of even aged crop can be from valid yield table	B.	Under stocked stands tend to approach fully stocked stands with increase in age, though more rapid growth than the latter
C.	Both (a) & (b)	D.	None of these

Estimation of movement ratios from average diameter growth by diameter classes is / are :

A.	Tree diameters include in a dia class in the present stand tables are distributed uniformly, about the class centre	B.	Movement ration: Proportion of trees which will move onto next higher classes
C.	Both (a) & (b)	D.	None of these

Movement ration means:

A.	Estimation of movement ration from actual diameter growth of individual tree	B.	4 trees will remain in 6" dia class
C.	5 trees will move to 7" dia class	D.	6 trees will move to 8" dia class
E.	All of the above

Increment determination by control method is / are :

A.	In Swiss, forest are managed intensively under selection system	B.	Each compartment is enumerated 100% at 5-6 years intervals
C.	Records are kept by copartments of all mortality and all cut trees in interval between two successive counts	D.	All of the above

10.

Increment by continuous forest inventory (CFI) means:

A.	Used in USA and Canada	B.	Large area under first, they can't adopt other method
C.	Sometime metallic rod is fixed in centre	D.	Measured after 5 or 10 years
E.	All of the above