Which of the following plants are used as wind breaks?

Related Mcqs:

1. The non-green plants are as important as the green plants because they:

   A. Cause human disease
   B. Cause diseases of other plants
   C. Are useful in several industries
   D. Bring about decomposition of dead animals and plant remains

2. Those chemicals which are produced by plants and affect other plants are broadly called:

   A. Depresants
   B. Allomones
   C. Allelochemics
   D. Kairomones

3. Among the plants listed, point out one that does not fit into ecological group represented by the other plants:

   A. Acacia
   B. Aloe
   C. Euphorbia
   D. Rhizophora

4. Among the plants listed, point out one that does not fit into biological group represented by other plants

   A. Euphorbia
   B. Acacia
   C. Vallisneria
   D. Aloe

5. To prevent wind and water erosion, the crop is sometimes harvested in such a way that a basal stub of the plant is left behind. This phenomenon is called:

   A. Ley farming
   B. Mulching
   C. Basin listing
   D. Strip cropping

6. The major types of wind erosion are:

   A. Siltation
   B. Soil creep
   C. Suspension
   D. All of the above

7. The factors to control of wind erosion are:

   A. The soil should be kept moist as far as possible especially in the season of windstorms. Moist soil is less vulnerable to wind erosion than dry soil
   B. Wind breaks by planting tree in rows or shelter belts of any means are effective in wind erosion
   C. Both (a) & (b)
   D. None of these

8. An anatomical features, which exclusively develops to counter high velocity of wind:

   A. Reaction wood formation
   B. Absence of secondary growth
   C. Absence of tylosis
   D. All of these

9. At present _____ of area in Pakistan is suffering from wind erosion:

   A. 30%
   B. 40%
   C. 50%
   D. 60%

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

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