List of top Soil Science Questions on Basics of Soil Science

The minimum wind velocity at 0.30 m from ground surface required to initiate the movement of the most erodible soil particle is about:
Match LIST I with LIST II
\[ \begin{array}{|l|l|} \hline \textbf{LIST I (Soil order)} & \textbf{LIST II (Characteristics)} \\ \hline A. \ \text{Spodosol} & I. \ \text{Granular and crumb} \\ B. \ \text{Oxisol} & II. \ \text{Lack of profile development} \\ C. \ \text{Mollisol} & III. \ \text{Humid climate} \\ D. \ \text{Zatisol} & IV. \ \text{High in iron} \\ \hline \end{array} \] Choose the correct answer from the options given below:
The water held tightly to the surface of soil particles by adsorptive forces is called:
The size of the soil particles prone to saltation due to wind ranges from:
Write the order of the following regions according to their increasing order of annual rainfall amount received.
A. Karnataka Plateau
B. West Coast
C. Kutch in Gujarat
D. Eastern Coastal Plain
The minimum grade for the drains of 10 cm diameter should be:
One horse power is equal to:
The characteristic of Saline-Alkali soil are
Following are four stages of group development. Arrange them in order:
(A) Healing stage
(B) Development stage
(C) Stabilisation stage
(D) Formation stage
A personnel who because of special interest and fitness is selected to serve as a leader in advancing some phase of local extension programme is called
The soil hydraulic head is expressed by
Ecological races are also known as
Trace elements that show affinity for sulphide minerals are called

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Statement (I): The capacitance method measures soil moisture content by analyzing changes in electrical capacitance.
Statement (II): The finger-licking method estimates soil moisture content based on tactile sensations.
The process by which neutrons lose their kinetic energy through elastic collisions in the soil is known as

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Chemical weathering involving complete disintegration or modification in structure and composition of primary minerals is –
Assertion (A): Darc'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.
Mass media channels are relatively more important than interpersonal channels for
Dichloral urea is used as a

Match List-I with List-II:

Match List-I with List-II:

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.
The steady-state soil infiltration rate is