List of top Physical Sciences Questions on Water Management

Given below are two statements:

Statement (I): The capacitance method measures soil moisture content by analyzing changes in electrical capacitance, offering precise numerical readings due to its direct correlation with moisture levels.
Statement (II): The finger-licking method estimates soil moisture content based on tactile sensations, yielding subjective numerical values prone to individual interpretation biases.

In light of the above statements, choose the most appropriate answer from the options given below.

The pF curve is same as

The steady-state soil infiltration rate is

Given below are two statements, one is labeled as Assertion (A), and the other one labeled as Reason (R).
Assertion (A): Drainage increases the soil temperature.
Reason (R): Drainage decreases the heat capacity.
In light of the above statements, choose the most appropriate answer from the options given below:

Saturated hydraulic conductivity in situ is measured by

Given below are two statements, one is labeled as Assertion (A), and the other one labeled as Reason (R).
Assertion (A): Darcy's law is valid for a steady and stationary flow process in the soil.
Reason (R): In a steady flow condition, potential and gradient at every point in the flow path remain constant.
In light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements, one is labeled as Assertion (A), and the other one is labeled as Reason (R).
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.
In light of the above statements, choose the most appropriate answer from the options given below:

The soil hydraulic head is expressed by
(A). Potential energy per unit mass of soil water.
(B). Potential energy per unit volume of soil water.
(C). Potential energy per unit weight of soil water.
(D). Height of standing water on the soil surface.
Choose the correct answer from the options given below:

Given below are two statements, one is labeled as Assertion (A), and the other one labeled as Reason (R).
Assertion (A): Organic mulch conserves soil moisture.
Reason (R): Organic mulches cut off solar radiation falling on the soil surface and reduce evaporation.
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): Organic farming promotes environmental sustainability
Reason (R): Organic farming avoids the use of synthetic pesticides and fertilizers, which helps preserve soil health, conserve water resources, and reduce pollution of air and water bodies.
In light of the above statements, choose the most appropriate answer from the options given below.

Conversion period of an organic farm is generally (for perennial crop)

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Waterlogged soil typically displays a grayish color due to reduced oxygen levels.
Reason (R) : Upland soil usually maintains a reddish or brownish hue due to its well-aerated nature.

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) : Surface tension of water is very high (72.7dynes/cm) compared to other liquids.
Reason (R) : High attraction of water molecules for each other is because of H bond.
In light of the above statements, choose the correct answer from the options given below.

The soil hydraulic head is expressed by

Given below are two statements :
Statement (I) : At field capacity matric potential, the soil water content is higher when dry soil is getting wet.
Statement (II) : The drying of soil depends on the narrow radii of the connecting channels, whereas the wetting process depends on large pore diameters.
In light of the above statements, choose the most appropriate answer from the options given below.

Arrange the following soil texture with decreasing field capacity water content.
(A) Sandy loam
(B) Sandy
(C) Silty loam
(D) Clay
E) Clay loam
Choose the correct answer from the options given below :

The equation governing flow of water in saturated soil is

The capillary rise in soil (h, cm) with average pore radius (r, cm) is related as

The term "Infiltrability" is coined by

Match List-I with List-II
{|p{7cm}|p{7cm}|} List-I (Physical parameter) & List-II (Unit)
(A) Surface tension & (I) Kilogram per cubic meter
(B) Viscosity & (II) Newton per meter
(C) Soil permeability & (III) Meter per hour
(D) Particle density & (IV) Pascal
(E) Soil water potential & (V) Pascal-second

Match List-I with List-II

List-I (Institutes) & List-II (Headquarts)
(A) IISS & (I) Hyderabad
(B) IIHR & (II) Bangalore
(C) CRIDA & (III) Jodhpur
(D) CAZRI & (IV) Bhopal

A soil 80 cm deep has a volume water content = 0.12. Find out the quantity of water that must be added to bring the volume water content to 0.30.