Soil water that is available to plants seldom has water potential more negative than:
A.3.0 MPa
B.? 1.5 MPa
C.? 2.0 MPa
D.? 2.5 MPa
Category: Agriculture Plant Physiology Mcqs
Which of the following is a micronutrient?
A.Calcium
B.Phosphorous
C.Copper
D.Magnesium
Which of the following plants cannot fix atmosphere nitrogen directly?
A.Bean
B.Castor
C.Pea
D.Gram
At equilibrium, the vapour density or pressure about pure water in a closed container is:
A.85%
B.98%
C.95%
D.100%
In unisexual plants sex can be changed by application of:
A.Auxins
B.ABA
C.Ethanol
D.Cytokinins
Which of the following can fix atmospheric nitrogen?
A.Alkaloids
B.Fats
C.Alcohols
D.Anabacena
Turgidity of a cell is maintained by:
A.Diffusion pressure
B.Wall pressure
C.Osmotic pressure
D.Turgor pressure
Except which one, all other processes help in adding nitrogen to soil:
A.Bacterial decay of animal remains
B.Electric lightning
C.Addition of lime in soil
D.Nitrogen fixing bacteria
CO2 is necessary for photosynthesis; the chemical used to remove this gas most effectively from entering a control apparatus is:
A.Calcium oxide
B.Distilled water
C.Sodium carbonate
D.Potassium hydroxide solution
