Sustained Yield Regulations

A. CFI is most accurate and determines growth under actual conditions
B. Unlike two way and stand table method, it does not rely on assumption that trees during next ten years will grow at same rate as they have grown in the past 10 years
C. Both (a) & (b)
D. All of the above

A. Use of forest resource at a constant level which it can sustain in perpetuity at a given intensity of management
B. Continuous supply of products from forests in existing stage
C. To facilitate organization and administration
D. All of the above

A. It stresses the removal of only part of mature trees which is against economic and silvicultural grounds
B. If a forest is in a poor condition, sustained yield management will provide low regular yield
C. Both (a) & (b)
D. None of these

A. That forest which has reaches and maintains a practically attainable degree of perfection in all its parts for the full and continued satisfaction of objects of management
B. The provide sustained yield the growing stock must first be moulded to approach a model
C. Both (a) & (b)
D. None of these

A. It is an ideal against which an actual forest may be compared
B. Normal increment “the increment laid on by a normal forest”
C. Normal age class distribution “A complete series of age classes in such proportions as will permit equally yields by volume from annual or periodic felling under given rotation and silvicultural system
D. All of the above

A. Cannot be easily visualized as that of even-aged forests
B. To provide sustained yield annually, an unevenaged forest must have more trees in each of lower size classes
C. Both (a) & (b)
D. None of these

A. In selection forest, the stem numbers fell off from lower to higher dia classes in a geometric progression
B. So there was a constant ratio between numbers in successive dia classes from lowest to the highest
C. Both (a) & (b)
D. None of these

A. Site: An area considered in terms of its environment, particularly as this determines the type and quality of vegetation the area can carry”
B. Exploitable sizes are attained much sooner on higher than on lower site qualities, enabling shorter rotations
C. Both (a) & (b)
D. None of these

A. Volume per acre at rotation age
B. Physiology and soil
C. Ground vegetation
D. Height of dominant and co-dominant trees
E. All of the above

A. Species composition
B. Stocking and density
C. Optimum stocking level
D. Age and size
E. All of the above