List of top Soil Science Questions asked in ICAR AIEEA (PG)

Assertion (A): Cations adsorbed on soil colloids determine aggregate formation.
Reason (R): Cations form electropositive links between electronegative soil particles.
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:
Statement (I): Hue is a measure of the chromatic composition of light.
Statement (II): The Munsell colour system is based on five principal hues.

Match List-I with List-II:

Microorganisms that oxidise ammonia to nitrite
(A) Nitrosomonas
(B) Thiobacillus
(C) Nitrobacter
(D) Nitrosolobus
Choose the correct answer from the options given below:
Which of the following is/are the example of nitrifying bacteria?
Arrange the following in decreasing order of Basal Spacing:
(A) Kaolinite
(B) Montmorillonite
(C) Illite
(D) Vermiculite
Choose the correct answer from the options given below:
The term oligotrophic refers to
Bray No. 1 is
Which of the following nutrient is related with deficiency symptoms like discoloration of leaf buds, breaking and dropping of buds?
Dolomite is a source of
(A) Calcium
(B) Magnesium
(C) Iron
(D) Sulphur
Choose the correct answer from the options given below:
The steady-state soil infiltration rate is
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:
The parameters of N use efficiency are
(A) Apparent N. recovery
(B) Agronomic efficiency
(C) Production efficiency
(D) Physiological N efficiency
Choose the correct answer from the options given below:
Mottle leaf of citrus is caused by the deficiency of
Assertion (A): Equilibrium water content in soil at a certain matric potential is higher when the soil is under the drying process (desorption) compared to when the soil is under the wetting process (sorption).
Reason (R): The contact angle between water and the soil solid phase is greater during the imbibition of water than during drainage.
Assertion (A): Gypsum is commonly used for the reclamation of sodic soil.
Reason (R): Reclamation process involves reduction in exchangeable sodium with calcium and its removal from soil solution through leaching.
Laterite soil is rich in
The amount of organic matter in a soil with 'Value 0' according to Munsell colour system is--
Arrange the following in decreasing order according to the number of linkages among silicon tetrahedra of soil particles:
(A) Nesosilicates
(B) Phyllosilicates
(C) Tectosilicates
(D) Inosilicates
Choose the correct answer from the options given below:
Statement (I): Single superphosphate, double superphosphate, triple superphosphate are mono-calcium phosphate.
Statement (II): Mono calcium phosphates are water soluble and thus have high leaching losses.
Organic nutrients in water bodies promote
The organic certificate of an organic farm is valid for
Arrange the following forms of soil consistencies with decreasing soil wetness:
(A) Hard
(B) Friable/Soft
(C) Plastic
(D) Viscous
(E) Sticky
Model is an example of