Nitrogen fixation is accomplished by:_________?

Related Mcqs:

1. Nitrogen & sulphur dioxide liberate from motor vehicles & industries. Nitrogen & Sulphur gases dissolve in the water vapour of atmosphere & form nitric & sulphuric acid. This rain water falls on soil as__________ & contaminates soil also:

   A. Acid rain
   B. Neutral rain
   C. Both A & B
   D. None of the above

   Submitted by: Shafiq Rehman

2. The plant in which CO2 fixation is solely via the Calvin cycle is_____________________?

   A. C
   B. CAB
   C. C
   D. CAM

3. Potassium (K) fixation capacity is maximum in:____________?

   A. Vermiculite
   B. Illite
   C. Montmorillonitic
   D. Amorphous clay

   Submitted by: Shafiq Rehman

4. Maximum fixation of K occurs:__________?

   A. 1:1 clay mineral
   B. 1:2 clay mineral
   C. 2:1 clay mineral
   D. 2:2 clay mineral

   Submitted by: Mir Mehrbiyar

5. Flow of nitrogen in soil due to:_________?

   A. Diffusion
   B. Interception
   C. Mass flow
   D. None of the above

   Submitted by: Shafiq Rehman

6. The available from of nitrogen for plant is________________?

   A. NO₃
   B. NH₄
   C. Both a & b
   D. None of the above

7. Biochemical reduction of nitrate to nitrite or gaseous nitrogen is called ________________________?

   A. Reduction
   B. Oxidation
   C. Denitrification
   D. None of the above

8. Nitrogen gases are involved in_____________________?

   A. Sleepy feelings
   B. Hair disease
   C. Mental disease
   D. Acid rains

9. Phosphorus (P) is the second major nutrient essential for plant growth. With the exception of Nitrogen (N) and Potassium (K), Phosphorus is required by plants in_________?

   A. Lesser quantities
   B. Greater quantities
   C. Not required
   D. The above statement is wrong

   Submitted by: Shafiq Rehman

10. Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?

    A. Denitrification
    B. Leaching
    C. Volatilization
    D. None of these

    Submitted by: Shafiq Rehman