The principal disadvantages of the selection system are:

Related Mcqs:

1. Principal advantages of the selection system are:

   A. This method is extremely simple
   B. Natural flora is preserved
   C. More volume per acre
   D. All of the above

2. The principal of positive economic features and the underlying hypotheses about agroforestry are:

   A. Maintains or increases site productivity through nutrient recycling and soil protection, at low capital and labour costs
   B. Increase the value of output on a given area of land through spatial or inter temporal intercropping of tree and other species
   C. Both (a) & (b)
   D. None of these

3. Coppice selection means:

   A. When mature crop is removed by clear felling and regeneration is entirely by vegetative methods
   B. When some selected shoots are selected for retention for future period
   C. When crop is partly of coppicing and partly of seedling organ of different age clear
   D. None of these

4. 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

5. Selection thinning is:

   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

6. Selection of the “best” alternative should be based on several factors:

   A. Technical soundness of the plan
   B. Available resources in terms of funding, manpower, infrastructure, etc.
   C. Institutional (legal, political) potential for success
   D. All of the above

7. Competition for water, minerals, light and space is most severe between two:

   A. Closely related species occupying the same niche
   B. Closely related species occupying different niche
   C. Unrelated species occupying the same niche
   D. Species occupying different overlapping ecosystems

8. The driving force of the ecosystem is:

   A. Carbohydrates in plants
   B. Biomass
   C. Solar energy
   D. Producers

9. Deers are:

   A. Autotrophic
   B. Heterotrophic
   C. Herbivores
   D. Atrophic

10. Every ecosystem must have a continuous external source of:

    A. Energy
    B. Oxygen
    C. Living organism
    D. Bacteria