The kind of windbreak is:

Related Mcqs:

1. After proper design and establishment of the windbreak, the farmer needs to pay particular attention to a key management needs:

   A. Grazing protection
   B. Fire protection
   C. Pruning
   D. Harvesting
   E. All of the above

2. 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%

3. Which of the following plants is used as windbreak?

   A. Delonix
   B. Mangifera
   C. Eucalyptus
   D. Prosopis

4. Which one of the following is not a matching pair of certain organism/s and the kind of association?

   A. Shark and sucker fish-commensalism
   B. Algae and fungi in lichens-parasitism
   C. Orchids growing on trees-epiphytism
   D. Cuscuta (doder) growing on other flowering plants-epiphytism

5. Windbreaks/shelterbelts cover:

   A. Trees and / or shrubs can substantially improve the productivity of farmlands
   B. They are exposed to strong winds
   C. Both (a) & (b)
   D. None of these

6. Influence on crop yields is:

   A. Are carefully measured at various points on a line perpendicular to the center of the windbreak
   B. By calculation, it can be shown that the total potential yields for most crops will be 2-10% greater on the field
   C. Both (a) & (b)
   D. None of these

7. In Pakistan, because of small field size, most often 2 or 3 rows windbreaks are used, and should expect the effects to reach only about 12H downwind and _____ upwind:

   A. 1H
   B. 2H
   C. 3H
   D. 4H

8. 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%

9. How windbreaks functions is:

   A. The air is baffled and mixed as it hits the wind breaks
   B. Causing a disruptive turbulence patterns which spoils the energy and velocity of the wind
   C. This mixing and churning continues as the pressure gradient is built by the windbreak and the air leaks through or rolls over the top of the screen
   D. All of the above

10. The Watershed is:

    A. It is a Land body which drains into a stream system
    B. Its an other name of catchment watershed
    C. Both (a) & (b)
    D. None of these