Many plant species need very large amount of water. They are: ___________?

Related Mcqs:

1. Nutritive elements needed in large quantities to ensure normal plant development:

   A. N, P, K
   B. S, Mg, Ca, Fe
   C. Both a & b
   D. None of a & b

   Submitted by: Shafiq Rehman

2. The lower leaves turn yellow and in some crops they quickly start drying up as if suffering from shortage of water, stunted growth, leaves & fruits shedding & whole plant becomes yellow, are deficiency symptoms of:_________?

   A. Potash
   B. Nitrogen
   C. Calcium
   D. Both a & c

   Submitted by: Shafiq Rehman

3. Potassium plays a significant role in the transport of water & nutrients through the plant in the xylem. When the supply of K is reduced, the transportation of ___________________ is depressed:

   A. Nitrates, Phosphates
   B. Calcium, magnesium
   C. Amino acids
   D. All of the above

   Submitted by: Shafiq-ur-Rehman

4. The maximum amount of water which a soil can hold after free drainage has ceased is called as_______?

   A. Water potencial
   B. Water use efficiency
   C. Water harvesting
   D. Water holding capacity

   Submitted by: Shafiq Rehman

5. The amount of water that can be absorbed by an oven dry soil at 105•c when it is exposed to an atmosphere of 100% relative humidity is called:

   A. Field Capacity (FC)
   B. Maximum water holding capacity
   C. Hygroscopic coefficient
   D. Permanent wilting point

   Submitted by: Shafiq-ur-Rehman

6. Elements essentially required for growth of all plants species are___________________?

   A. 32
   B. 15
   C. 16
   D. 3

7. The evolution of new species is known as_____________?

   A. Specialization
   B. Speciation
   C. Smog
   D. None of these

   Submitted by: Shafiq Rehman

8. The most suitable species for reclamation of sandy soils is:_________?

   A. Casuarina equiselifolia
   B. Acacia spp
   C. Azadirachta indica
   D. All of the above

   Submitted by: Shafiq Rehman

9. The suitable species for reclamation of saline & sodic soil is:__________?

   A. Casuarina equisetifolia
   B. Albizia lebbeck
   C. Both A & B
   D. None of the above

   Submitted by: Shafiq Rehman

10. Plant & animal residues contain: ___________?

    A. Sugar, celluloses, hemicelluloses
    B. Proteins, lignins
    C. Waxes, lipids
    D. All of the above

    Submitted by: Shafiq-ur-Rehman