GEOGRAPHY MCQS SET 81

GEOGRAPHY MCQS SET 81

801) Assertion (A) : Soil consists of liquid, solid and gaseous states. Reason (R) : Gases present in the open pores of the soil consist not only of the atmospheric gases, but also of gases liberated by biological activity and chemical reactions within the soil.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is not the correct explanation of A
C) A is true, but R is false
D) A is false but R is true

Answer: Both A and R are true but R is not the correct explanation of A
   
802) The soil column, which represents the dynamic and distinctive layers of the soil, comprises which horizon/ horizons
A) A
B) B
C) A and B
D) A, B and C

Answer: A and B
   
803) Identify the correct statement
A) Soil column comprises, A, B and C-horizons
B) C-horizon lies below the level of root activity
C) The substance of the soil exists in solid and liquid states
D) Field capacity of a soil is also referred to as wilting point

Answer: C-horizon lies below the level of root activity
   
804) The capacity of a soil to hold water against the pull of gravity is called as
A) storage capacity
B) wilting capacity
C) wilting point
D) hygroscopic capacity

Answer: hygroscopic capacity
   
805) What is described in terms of the shape, size and durability of peds?
A) Soil horizon
B) Soil texture
C) Soil consistence
D) Soil structure

Answer: Soil structure

806) Assertion (A) : The C-horizon is affected by physical and chemical processes.
Reason (R) : Podzol soils are very suitable for grain crops because these soils contain good amount of bases.
A) Both A and R are true and R is the correct explanation A
B) Both A and R are true but R is not the correct explanation of A
C) A is true, but R is false
D) A is false, but R is true

Answer: Both A and R are true but R is not the correct explanation of A
   
807) Chestnut soil and Chemozems are the equivalent of _________ in the CSCS.
A) spodosols
B) alfisols
C) histosols
D) mollisols

Answer: mollisols
   
808) Which one of the following statements is not correct?
A) Application of lime makes the soil acidic.
B) High acidity in soil is is typical of humid climate.
C) Increasing soil activity results in declining soil fertility.
D) Arid climate is characterised by alkaline soil.

Answer: Arid climate is characterised by alkaline soil.
   
809) In wet regions, soil water often washes clay particles down through root channels and worm tunnels. The clay particles are then deposited in the subsoil. This process is called
A) eluviation
B) cheluviation
C) lessivation
D) leaching

Answer: eluviation
   
810) Identify the wrong statement
A) Terra Rossa is a soil typical of Mediterranean Scrub Biome
B) Science of soils is called Pedology
C) Stream is the most important agent of soil erosion
D) The term Edaphic refers to soils

Answer: Stream is the most important agent of soil erosion