The disadvantage of ploughing in arid and semi-arid zones is:

Related Mcqs:

1. About ______ percent of the country is arid to semi-arid:

   A. 50
   B. 60
   C. 70
   D. None of these

2. In Pakistan about ________ area is arid or semi arid and agriculture is not possible without irrigation:

   A. 40%
   B. 50%
   C. 60%
   D. 70%

3. Except in the _______ most of the rangelands are located in the arid and semi-arid areas:

   A. Himalayan forest grazing areas
   B. Pothwar scrub ranges
   C. Both (a) & (b)
   D. None of these

4. The removal of weeds by ploughing is called:

   A. Mulching
   B. Fallowing
   C. Tilling
   D. Contour farming

5. Plants grow sparsely in arid regions of the world:

   A. Only because of high temperature
   B. Because no seeds fall near the soil
   C. Because of several environmental factors combining together
   D. Because the soil is sandy

6. A country where _____ per cent of the total aea consists of moutains, gullied foot hills, arid waste and deserts, can never achieve the desired progress unless major part of this usable waste is harnessed to the advantage of its people:

   A. 50 to 55
   B. 55 to 60
   C. 65 to 70
   D. None of these

7. D.G. Khan tract is typical of very arid:

   A. Sub-mountainous area
   B. Sub-tropical area
   C. Both (a) & (b)
   D. None of these

8. Plant groups growing in zones where high temperature alternates with low temperature are called:

   A. Megatherms
   B. Hekistotherms
   C. Microtherms
   D. Mesotherms

9. The most common method used for cultivation on hills:

   A. Levelling
   B. Ridge terracing
   C. Bench terracing
   D. Channel terracing

10. Soil erosion can be prevented by:

    A. Deforestation
    B. Heavy rains
    C. Afforestation
    D. Over grazing