Conditions or factors which influence the crown closure is:

Related Mcqs:

1. Influence of soil and moisture conditions means:

   A. If soil is properly worked and weeding is carried out then any local spp can be planted nan area
   B. It has been seen that in spite of high early success there is failure later on
   C. Both (a) & (b)
   D. None of these

2. Hazards include all those factors that can injure or kill an animal (natural factors)

   A. Fire, rain and wind as well as man made structures such as roads and fences
   B. Thus challenging an animal’s physiological capacity as to prevent it from reproducing successfully
   C. Both (a) & (b)
   D. None of these

3. Degree of crown density in a forest stand is:

   A. Closed
   B. Dense
   C. Thin
   D. Open
   E. All of the above

4. The influences of crown on trees is:

   A. Quality of bole or wood
   B. Volume production per unit area
   C. Control composition of species
   D. Regulate seeds and resin production
   E. All of the above

5. 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

6. General characteristics of crown are:

   A. In young age crowns are usually conical in shape but as the time passes the crown shape becomes rounded
   B. Drooping forms also occur in many species e.g. Polyalthia longifolia
   C. Both (a) & (b)
   D. None of these

7. Crown includes:

   A. Palm trees
   B. Bamboo
   C. Conifers
   D. All of the above

8. Shapes of crown serve to expose the leaves to sunlight and air. The types of crowns of tree:

   A. Conical
   B. Umbrella
   C. Spherical
   D. Columnar
   E. All of the above

9. A windbreak with 50% crown density is more effective than one of either 100% or of ______ density:

   A. 15%
   B. 20%
   C. 25%
   D. 30%

10. The best windbreaks approach is 100% crown density in the low-profile shurb, rows, and _____ density in the tall rows:

    A. 50%
    B. 60%
    C. 70%
    D. 80%