List of top Soil Science Questions on Soil Microbiology

Given below are two statements:
Statement (I): Nitrobacteria are obligate autotrophic aerobes
Statement (II): Nitrate will not be produced from NH$_4^+$ in the absence of oxygen

Statement (I): Hue is a measure of the chromatic composition of light.
Statement (II): The Munsell colour system is based on five principal hues.

The height of the capillary rise of water in the soil is
(A) Inversely proportional to the radius of the tube
(B) Inversely proportional to the density of water
(C) Directly proportional to the radius of the tube
(D) Inversely proportional to the surface tension of water
Choose the correct answer from the options given below:

Microorganisms that oxidise ammonia to nitrite
(A) Nitrosomonas
(B) Thiobacillus
(C) Nitrobacter
(D) Nitrosolobus
Choose the correct answer from the options given below:

Elements associated with nitrogenase enzyme in biological nitrogen fixation
(A) Molybdenum
(B) Iron
(C) Copper
(D) Nickel
Choose the correct answer from the options given below:

Arrange the following forms of soil consistencies with decreasing soil wetness:
(A) Hard
(B) Friable/Soft
(C) Plastic
(D) Viscous
(E) Sticky