BGA was discovered as a nitrogen fixer in paddy field by ?

A. Beijerinck
B. Fred
C. P.K dey
D. None of the above

Submitted by: Shafiq Rehman

Related Mcqs:

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
The available from of nitrogen for plant is________________?
A. NO₃
B. NH₄
C. Both a & b
D. None of the above
Biochemical reduction of nitrate to nitrite or gaseous nitrogen is called ________________________?
A. Reduction
B. Oxidation
C. Denitrification
D. None of the above
Nitrogen gases are involved in_____________________?
A. Sleepy feelings
B. Hair disease
C. Mental disease
D. Acid rains
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
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
The credit for identifying the essentality of nitrogen to plants goes to________?
A. Dr.Muhammad Sharif
B. Theodore-saussure
C. Shafiq Baloch at.el
D. Sach and knoop
Submitted by: Shafiq Rehman
Nitrogen fixation is accomplished by:_________?
A. Fungi
B. Bacteria from atmosphere
C. Plants
D. None of these
Submitted by: Mir Mehrbiyar
Azotobacter fixes atmospheric nitrogen in the soil by:__________?
A. Symbiotically
B. Non-symbiotically
C. Can fix A & B
D. None of these
Submitted by: Mir Mehrbiyar
Flow of nitrogen in soil due to:_________?
A. Diffusion
B. Interception
C. Mass flow
D. None of the above
Submitted by: Shafiq Rehman