Q 1 – Which one of the following is a step in the formation of soil?
(a) Earthquakes or volcanic eruptions
(b) Weathering of rocks
(c) Addition of humus
(d) All are involved in the formation of soil
Ans. (d) All are involved in the formation of soil
Q 2 – In which horizon of soil minerals are found?
(a) A
(b) B
(c) C
(d) None of these
Ans. (b) B
Q 3 – Which physical property of soil is important to us?
(a) Texture
(b) Water holding capacity
(c) Both of these
(d) None of these
Ans. (c) Both of these
Q 4 – Which of the following type of soil will form a colloidal solution when suspended in water?
(a) Clay
(b) Silt
(c) Sand
(d) Gravel
Ans. (a) Clay
Q 5 – Which factor influences soil formation?
(a) Climate
(b) Vegetation
(c) Parent rock
(d) All of these
Ans. (d) All of these
Q 6 – The proportion of sand, silt and clay in a soil sample determines
(a) structure
(b) texture
(c) nutrient potential
(d) fertility level
Ans. (b) texture
Q 7 – The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients.
(a) Desert
(b) Forest
(c) Open field
(d) Cricket ground
Ans. (b) Forest
Q 8 – Availability of water and minerals in the soil for maximum absorption by roots is in the:
(a) B-horizon
(b) C-horizon
(c) A-horizon
(d) Surface of soil
Ans. (c) A-horizon
Q 9 – Soil conservation measures are mainly aimed at protecting which of the following?
(a) Plants
(b) Topsoil
(c) Sub soil
(d) Soil organisms
Ans. (b) Topsoil
Q 10 – Read the following statements with reference to soil:
(i) Weathering is a very fast process of soil formation.
(ii) Percolation of water is faster in sandy soils.
(iii) Loamy soil contains only sand and clay.
(iv) Top soil contains the maximum amount of humus.
Choose the correct statements from the above.
(a) (ii) and (iv)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (ii)
Ans. (a) (ii) and (iv)
Q 11 – _________ are soils in which more than half of the parent mineral matter is volcanic ash and
appear very dark in colour.
(a) Desert soil
(b) Volcanic soil
(c) Alluvial soil
(d) Clayey soil
Ans. (b) Volcanic soil
Q 12 – A well-developed soil prof ile is the result of :
(a) physical process
(b) chemical process
(c) organic process
(d) All of the above
Ans. (d) All of the above
Q 13 – Soil contains rock particle and_______.
(a) water and air
(b) water and plants
(c) minerals, organic matter, air and water
(d) water, air and plants
Ans. (c) minerals, organic matter, air and water
Q 14 – Of the f our distinct layers or sections of soil prof ile, organic matter is f ound in:
(a) top soil
(b) second layer f rom the top
(c) third layer f rom the top
(d) the bottom layer
Ans. (a) top soil
Q 15 – The topmost soil:
(a) is soft
(b) is a porous layer
(c) can retain more water
(d) All of the above
Ans. (c) All of the above
Q 16 – Soil best suited f or cultivation of wheat, rice and sugarcane is
(a) Alluvial soil
(b) Laterite soil
(c) Mountain soil
(d) None of these
Ans. (a) Alluvial soil
Q 17 – Humus refers to the:
(a) top most layer
(b) bottom layer
(c) rotting dead matter in soil
(d) None of these
Ans. (c) rotting dead matter in soil
Q 18 – Clay particles are of size
(a) More than 0.004 mm
(b) Less than 0.04 mm
(c) More than 0.02 mm
(d) Less than 0.002 mm
Ans. (d) Less than 0.002 mm
Q 19 – ________ does not lead to soil erosion.
(a) Deforestation
(b) Dense vegetation
(c) Over-grazing
(d) Winds
Ans. (b) Dense vegetation
Q 20 – Khadar’ is another name of
(a) Black soil
(b) Red soil
(c) Desert soil
(d) Alluvial soil
Ans. (d) Alluvial soil
Q 21 – Cotton is grown in
(a) Clayey soil
(b) Loamy soil
(c) Laterite soil
(d) Sandy loam soil
Ans. (d) Sandy loam soil
Q 22 – ___________ we can see the soil profile.
(a) At the sides of a road on a hill
(b) At steep of river bank
(c) Both the above
(d) None of these
Ans. (c) Both the above
Q 23 – Earthworms are called
(a) Natural decomposer
(b) Farmers enemies
(c) Farmers friend
(d) Plant destroyer
Ans. (c) Farmers friend
Q 24 – Soils are classified according to their:
(a) colour and type of mineral content
(b) colour and texture
(c) texture and type of mineral content
(d) colour, texture and type of mineral content
Ans. (b) colour and texture
Q 25 – Breaking down of big pieces of rock into smaller pieces is called
(a) Soiling
(b) Mounding
(c) Weathering
(d) Curving
Ans. (c) Weathering
Q 26 – Soil erosion is a process of
(a) Soil formation
(b) Soil pollution
(c) Weathering
(d) Removal of top soil
Ans. (d) Removal of top soil
Q 27 – Laterite soil is not f ound in
(a) Bihar
(b) Haryana
(c) Rajasthan
(d) Uttar Pradesh
Ans. (c) Rajasthan
Q 28 – Red soil In which horizon of soil weathering is taking place?
(a) C-horizon.
(b) O-horizon
(c) B-horizon
(d) A-horizon
Ans. (b) O-horizon
Q 29 – Dead and decaying material produced by plants in the soil is called
(a) Micro organism
(b) Humus
(c) Khaddar
(d) Fungus
Ans. (b) Humus
Q 30 – ________ has the highest water holding capacity.
(a) Sandy soil
(b) Clayey soil
(c) Loamy soil
(d) All of them have same water holding capacity
Ans. (b) Clayey soil
Q 31 – __________ should be banned to prevent soil pollution.
(a) Fertilisers
(b) Metals
(c) Plastics
(d) Glass
Ans. (c) Plastics
Q 32 – Horizons different from each other in:
(a) colour
(b) depth
(c) chemical composition
(d) All of the above
Ans. (d) All of the above
Q 33 – Which layer is formed of decayed organic matter?
(a) Air
(b) Humus
(c) Clay
(d) Minerals
Ans. (c) Clay
Q 34 – Series of layer in soil prof ile are called
(a) Longitudinal section
(b) Transverse section
(c) Sphere
(d) Horizons
Ans. (d) Horizons