A. In principle from the two methods already discussed
B. The dominant trees are removed in order to stimulate the growth of the trees of the lower crown classes
C. The same kind of vigorous trees those are favoured in crown
D. All of the above
Related Mcqs:
- Crown thinning or high thinning is:
A. Trees are removed from the upper crown classes in order to open up the canopy
B. It favour the development of the most promising trees of the same classes
C. Both (a) & (b)
D. None of these - Low thinning or ordinary thinning is:
A. Trees are removed from the lower crown classes
B. In the highest grade of low thinnings only the suppressed trees would be removed
C. Both (a) & (b)
D. None of these - The classes of trees are removed in selection thinning:
A. They are restricting the development of their neighbours on all sides
B. They are less valuable than their neighbours
C. They are of no special importance with regard to desirable species mixture
D. All of the above - Free thinning is:
A. The attention is concentrated still further on the selection of the stems evenly spaced over the ground
B. Which are to be retained to maturity or till the last thinning or two
C. Both (a) & (b)
D. None of these - Mechanical thinning is:
A. The trees to be cut or retained are chosen on the basis of a predetermined spacing
B. Or pattern with little or no regard for their position in the crown canopy
C. Both (a) & (b)
D. None of these - The standard grades of ordinary thinning is:
A. Light Thinning (A-Grade)
B. Moderate Thinning (B-Grade)
C. Heavy Thinning (C-Grade)
D. Very Heavy Thinning (D-Grade)
E. All of the above - The fundamental objectives of thinning are:
A. To redistribute the growth potential of the stand to optimum advantage
B. To utilize all the merchantable material produced by the stand during the rotation
C. Both (a) & (b)
D. None of these - Thinning problems are:
A. Good and bad trees mix that their spacing in uneven, so either good trees or trees at equal spacing are maintained
B. To search out negative characteristic tree (negative approach)
C. Both (a) & (b)
D. None of these - Species & site quality affect interval of thinning in way:
A. Species
B. Site quality (S.Q)
C. Both (a) & (b)
D. None of these - The supersonic jets cause pollution by thinning of:
A. O3 layer
B. SO2 layer
C. O2 Layer
D. CO2 layer
The correct answer to the question: "Selection thinning is:" is "All of the above".
