The problem of soil crosion Thal and Cholistan is predominantly due to___________________?

Related Mcqs:

1. Problem of erosion in Thal and Cholistan is due to____________________?

   A. Wind
   B. Fire
   C. Water
   D. Atmosphere

2. Any material such as straw, sawdust, leaves, plastic films, & loose soil that is spread upon the surface of the soil to protect the soil & plant roots from the effects of raindrops, soil crusting, freezing or evaporation:

   A. Mull
   B. Mulch
   C. Mycorrhizae
   D. Muck

   Submitted by: Shafiq Rehman

3. According to a latest research, Pakistan is predominantly a dryland country; 80% of its land area is arid and semi arid, 12% sub-humid and 8% under humid climate. Thus , soils of arid & semi-arid regions are vulnerable to a wide range of degradation process. As the case in arid and semi-arid climates elsewhere in south-central/southern Asia and Sub-Saharan Africa; _________________ are among the major causes of soil degradation and desertification?

   A. Drought stress
   B. Accelerated erosion & salinization
   C. Depletion of soil fertility and SOM
   D. All of the above

   Submitted by: Shafiq Rehman

4. Soil additive which stabilizes the soil, improves resistance to erosion, increases to permeability to air & water, improves texture, eases cultivation or otherwise improves soil quality:

   A. Soil amendment
   B. Soil conditioner
   C. Both a & b
   D. None of the above

   Submitted by: Shafiq Rehman

5. Pakistan being predominantly an arid and semiarid country, In addition to agricultural productivity losses and increasing poverty, desertification results in significant reductions in _________?

   A. Contributing to global warming
   B. Carbon storage in soils
   C. loss of biodiversity
   D. All of these

   Submitted by: Shafiq Rehman

6. Genetic correlation between two variables may be due to___________________?

   A. Gene interaction
   B. Peliotropy
   C. Dominance
   D. Selection differential

7. Ripening fruits soften due to___________________?

   A. Jelly formation at acidic pH
   B. Soubulization of pectate of middle lamelle
   C. Conversion of starch in sugar
   D. Incorporation of pectate in middle lamella

8. Degradation of green colour of fruits is due to___________________?

   A. pH changes
   B. Oxidative system
   C. Chloroplry lases
   D. All the above

9. Undesirable flavor in the food during storage is due to___________________?

   A. Prooxidants
   B. Antioxidants
   C. Rancidity
   D. None of the above

10. A soil is classified as sodic soil when______________________?

    A. EC is 8.5
    C. SAR is >13
    D. All the above