List of top Soil Science Questions

Match List-I with List-II. List-I Soil Property: A. Porosity, B. Potential flow, C. Soil moisture tension, D. Water balance. List-II Detail/Process: I. The ratio of volume of pores to the total soil volume, II. The irrotational and steady flow, III. The tenacity of soil by which water is retained in it, IV. Hydrological balance between rainfall and irrigation that change the soil moisture.

Match List-I with List-II. List-I Soil Conservation entities: A. Land grading, B. Land utilization index, C. Hydrograph, D. Hyetograph. List-II Description: I. Derived by plotting the rainfall intensity and time, II. Plotting the discharge and corresponding time data, III. Process of land modification under which field surface is reshaped to a desired slope and elevation, IV. The number of days in a year during which the crops occupy the land divided by 365.

Match List-I with List-II. List-I Process of water movement: A. Downward movement or entry of water into the soil surface, B. The movement of water through a column of soil, C. Downward and lateral movement of water into the soil, D. Movement of irrigation water from surface into and through the soil. List-II Terminology: I. Seepage, II. Water intake, III. Infiltration, IV. Percolation.

Match List-I with List-II. List-I Terminology/device: A. Tensiometer, B. Osmotic potential, C. Static water level, D. Contour. List-II Detail: I. Portion of water potential that results from the solute present in the soil system, II. The level at which the water stands in a well before pumping starts, III. Line joining equal elevation point of the field, IV. Soil moisture content.

Match List-I with List-II. List-I Type of Pump: A. Mixed flow pump, B. Axial flow pump, C. Centrifugal pump, D. Hydraulic Ram. List-II Detail: I. The wheel generally resembles the blade element that generates forced vortex flow, II. Pump has high discharge capacity but has low head and limited suction capacity, III. Pump which does not require any external power for its operation to raise water, IV. The inlet and outlet edge of the blades are inclined to the axis of rotation.

Match List-I with List-II. List-I Process of field drainage: A. The process of changing the natural topography so as to control the movement of water on to surface, B. Flat lands where there are only minor difference in field levels, C. The grade in the direction of drains can be \(0.05\) to \(0.5%\), D. Suitable for soils with poor conductivity with slopes not exceeding \(1.5%\). List-II Terminology of field drainage: I. Land forming, II. Land smoothing, III. Land grading, IV. Bedding system.

Match List-I with List-II. List-I Terminology used in Remote sensing: A. Active sensing, B. Passive sensing, C. Spectral, D. Spatial. List-II Detail: I. When the sensing device detects EMR originating from another source primarily from sun, II. It is the change in reflectance or emission of objects as a function of wavelength, III. It is the arrangement of terrain features providing attributes such as shape, size and feature, IV. When the sensing device detects EMR at an object and detects the amount of that energy which is reflected back.

Match List-I with List-II. List-I Terminology used in crop water requirement: A. Consumptive use, B. Water requirement, C. Irrigation requirement, D. Critical period. List-II Detail: I. Period during which yield of crop is affected severely due to inadequate moisture, II. Depth of water required for normal crop production plus leaching and other loss, III. The water needed for raising a crop in a given period, IV. The quantity of water lost in evaporation, transpiration and that used by the crop in metabolic activities.

Match List-I with List-II. List-I Critical stage for irrigation: A. Crown root initiation and flowering, B. Sprouting and tuberization, C. Tasseling and silking, D. Flowering and pod development. List-II Crop: I. Potato, II. Maize, III. Groundnut, IV. Wheat.

Match List-I with List-II. List-I Process of wind erosion: A. Floating of small size particles in the air stream, B. Soil particles movement in a series of bounces or jumps, C. Minimum wind velocity required to initiate the movement of soil particles, D. Rolling or sliding of large soil particles along the ground surface. List-II Terminology of wind erosion: I. Surface creep, II. Threshold velocity, III. Suspension, IV. Saltation.

Match List-I with List-II. List-I Soil moisture: A. Saturation, B. Field capacity, C. Permanent wilting point, D. Hygroscopic coefficient. List-II Detail: I. Water held by soil against an applied pressure of 15 bars, II. When all pores of the soil are filled with water, III. Maximum amount of water that a soil will retain after allowing free drainage, IV. The water held by the soil at 31 bar.

The soil loss caused by different components of water erosion is/are: A. Rain splash and hail impact erosion \((E_i)\), B. Runoff erosion \((E_r)\), C. Snow thaw erosion \((E_s)\), D. Chemical erosion \((E_{ch})\), E. Suspension \((E_s)\).

Match List-I with List-II. List-I Terminology: A. Capacity of pump, B. Suction lift, C. Static suction lift, D. Suction head. List-II Detail: I. When the source of water supply is above the centre line of the pump, II. The volume of water pumped per unit time, III. When the source of water supply is below the centre line pump, IV. The vertical distance from the free suction water level to the centre line of the pump.

Choose the correct statements: A. Soil erosion is the function of land slope only. B. Erosivity and erodibility are the erosion process. C. Erosivity depends on rainfall intensity. D. Erodibility is the soil property affecting the soil erosion. E. Erosivity is the dimensionless term.

Centrifugal pumps are classified according to: A. Type of energy conversion, B. Number of stages, C. Impeller types, D. Axis of rotation, E. Method of drive.

Following points should be considered in locating the centrifugal pump. A. Foundation should be sufficiently strong, B. Easily accessible for inspection and maintenance, C. Covered to protect it, D. Safeguard against submergence, E. Placed as close as possible to the water source.

Instruments used in Agro-meteorology are: A. Sunshine recorder, B. Anemometer, C. Penetrometer, D. Rain gauge, E. Pan evaporimeter.

Choose the correct formula/s: \[ \text{A. } Work = Force \times distance \] \[ \text{B. } Power\ received\ at\ the\ pump\ shaft\ is\ given\ by\ P=\rho gQH \] \[ \text{C. } Water\ Horsepower\ (WHP)=\frac{Q(lit/s)\times H(m)}{75} \] \[ \text{D. } Shaft\ Horsepower\ (SHP)=\frac{Water\ Horsepower}{Pump\ efficiency} \] \[ \text{E. } Brake\ Horsepower\ (BHP)=\frac{WHP}{Pump\ efficiency \times Drive\ efficiency} \] Choose the correct answer from the options given below:

Which statements is/are correct? A. The basic components of remote sensing system are target, energy source, transmission path and sensors. B. The sensors used in sensing are active and passive. C. Remote sensing has only one resolution i.e. spectral resolution. D. NOAA was the first operational remote sensing satellite system. E. In remote sensing the sensors are used to detect EMR.

The agronomical measures are used for the control of: A. Soil loss, B. Soil erosion, C. Sediment yield, D. Gabions, E. Raindrop impact.

The objectives of bench terracing are: A. To reduce the quantum of overland flow/sheet flow or run-off and their velocity, B. To minimize soil erosion, C. To conserve soil moisture, D. To promote intensive land use and permanent agricultural practices, E. To keep the environment pollution free.

General requirements of the permanent structures for gully control are: A. They should be constructed with permanent material, B. They should have adequate capacity to handle the run-off, C. They should help in stabilizing the gully, D. Perennial grasses required, E. Chute spillway are used at the bend to convey the water safely to the gully bed.

Recommended strip width for wind strip cropping are: A. Sandy soil -- \(6.0\ \text{m}\), B. Loamy sand -- \(7.0\ \text{m}\), C. Sandy loam -- \(30.0\ \text{m}\), D. Loam -- \(75.0\ \text{m}\), E. Silt loam -- \(85.0\ \text{m}\).

The objectives of contour cultivation are: A. To reduce sheet and rill erosion, B. To reduce sediment transport, C. To enhance infiltration rate, D. To stabilize the sand dunes, E. Provide fuel and fodder.

Arrange these gully development stages in a sequence. A. Development stage, B. Healing stage, C. Formation stage, D. Stabilization stage.