Sustained Yield Regulations

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

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

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

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

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

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

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

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

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 compartments of all mortality and all cut trees in interval between two successive counts
D. All of the above

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