List of top Physical Sciences Questions asked in ICAR AIEEA (PG)

The most abundant soil microorganism is:

Soil water matric potential for a wide range of soil wetness can be measured by

Atomic spectrum is an example of

Match List-I with List-II

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Match List-I with List-II

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The following are statements on fertilizer N use efficiency of crops. Which statement or the combinations are true?
(A) Partial factor productivity does not account for soil N-supply
(B) Agronomic efficiency requires data on soil N supply
(C) For soil N supply, the N-balance index is useful
(D) Soil N supply does not vary across soil types
Choose the correct answer from the options given below:

Arrange with the increasing level of energy required for disruption of soil aggregates:
(A). Ultrasonic dispersion
(B). Gently shaking in water
(C). Dry sieving
(D). Oxidation of organic matter
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Following are some famous space missions. Arrange them in chronology
(A) International Space Station, NASA
(B) NASA-ISRO Synthetic Aperture Radar (NISAR)
(C) Sentinel, ESA
(D) Robotic spacecraft Hayabusa, JAXA
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Match List-I with List-II

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Match List-I with List-II

Choose the correct answer from the options given below:

Given below are two statements:
Statement (I): Nitrogen is lost from waterlogged soils only by leaching
Statement (II): Waterlogged soils may develop iron toxicity to plants
In light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Soil temperature oscillations over a year penetrate deeper in the soil than over a day.
Reason (R) : Damping depth is proportional to angular frequency or period of oscillations.
In light of the above statements, choose the correct answer from the options given below.

Arrange the following clay minerals in terms of their increasing activity (measured through cation exchange capacity)
(A) Kaolinite
(B) Vermiculite
(C) Gibbsite
(D) Illite
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Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Kaolinite is the most preferred clay for the ceramic industry
Reason (R) : Kaolinite does not absorb water and expand
In light of the above statements, choose the correct answer from the options given below.

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Salt-affected soils in India are a threat to national food security and economic development
Reason (R) : Arid and semi-arid regions with high evaporation rates and with limited freshwater availability to flush out the excess salts from the soil, favoring the formation of saline soils
In light of the above statements, choose the most appropriate answer from the options given below.

The following statements relate to Kaolinite clay:
(A) Kaolinite is formed by the decomposition of orthoclase feldspar
(B) It does not expand when it comes in contact with water
(C) The kaolinite clays are 2:1 phyllosilicates
(D) Kaolinite clays have a fine texture
Choose the correct answer from the options given below:

Which of the following Atomic Absorption Spectrometers is used for determination of mercury?

According to Mohr and van Baren, arrange the following five stages of soil development
(A) Juvenile Stage
(B) Senile
(C) Un-weathered parent material stage
(D) Virile
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Which of the following microflora is most abundant in soil?

Given below are two statements:
Statement (I): Soil Oxygen Diffusion Rate measurement is based on Fick's law
Statement (II): The diffusion coefficient of $\text{O}_2$ is higher than $\text{CO}_2$}
In light of the above statements, choose the most appropriate answer from the options given below.

Original design of tensiometer was first proposed by

What is the porosity of a soil which has a bulk density of 1.33 $\text{Mg m}^{-3}$ [Pick the closest value]}

Gypsum, carbonates, micas, and feldspars are primarily located in:

The $\text{CO}_2$ around plant roots in the soil is exchanged with the atmosphere through the process known as:

In International Union of Soil Science classification system, fine sand has a size range of: