The process of accumulation of excess quantity of nutrients in water causing O2 deficiency is known as_____________________?

Related Mcqs:

1. Previously Essential nutrients required for the growth of plants were sixteen. In recent time the essential nutrients required for the growth of plants are:_________?

   A. 16
   B. 17
   C. 18
   D. None of the above

   Submitted by: Shafiq Rehman

2. The process by which nutrients chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil:

   A. Infiltration
   B. Percolation
   C. Leaching
   D. Seeping

   Submitted by: Shafiq Rehman

3. Water occupied the larger soil pores and moves down readily under the force of gravity. Water in excess of the field capacity is termed:

   A. Capillary water
   B. Hygroscopic water
   C. Gravitational water
   D. None of the above

   Submitted by: Shafiq Rehman

4. Deep percolation from a soil profile is generally measured by a device known as_____________________?

   A. Hydrometer
   B. Lysimeter
   C. Thermometer
   D. Tensiometer

5. 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

6. calcium is immobile in plants. Therefore, under conditions of deficiency, young tissue is affected first. calcium deficiency symptoms are:

   A. Death of terminal buds; roots tips also affected
   B. Abnormal dark green appearance of foliage
   C. Premature shedding of  blossoms & buds & weakened stem
   D. All of the above

   Submitted by: Shafiq-ur-Rehman

7. Accumulation of soluble salts root zone is known as____________________?

   A. Desodication
   B. Sodication
   C. Degradation
   D. Salininzation

8. Mutant allele that has little or no effect on the expression of a tart is known as_____________________?

   A. Atavism
   B. Auxotroph
   C. Axoneme
   D. Armor

9. Commercial production of fruits is known as_____________________?

   A. Pomology
   B. Orchading
   C. Horticulture
   D. Olericulture

10. Some substance are added intentionally to foods for the purpose of marketing them more profit able are known as_____________________?

    A. Food contamination
    B. Food adulterants
    C. Food additives
    D. All the above