List of top Soil Science Questions on Soil Structure and Clay Mineralogy

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 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 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.
Arrange these soil textural classes in descending order with respect to water permeability in root zone. A. Loam, B. Sandy loam, C. Clayey, D. Fine sandy, E. Gravelly.
Arrange the following soil types in descending order as per permanent wilting percentage of water. A. Fine sand, B. Sandy loam, C. Silt loam, D. Clay loam, E. Clay.
Arrange in descending order the soils on the basis of available water holding capacity. A. Clay loam, B. Silt loam, C. Clay, D. Fine loam, E. Sandy loam.
Tensiometers measure the:
Water that is held at a potential greater than \(-\frac{1}{3}\) bar and that portion of soil water that will drain freely from the soil by force of gravity is called:
The portion of water which is retained in the soil between field capacity \(\left(-\frac{1}{3}\ \text{bar}\right)\) and the permanent wilting coefficient \((-15\ \text{bar})\) is called:
Water which is held at soil water potential greater than \(-15\) bars is called: