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This is an interactive quiz on Soil: Structure and its Properties.
It includes topics such as structure of soil, water retention properties, soil depletion.
Bikash is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?
Clayey soil contains mainly clay having very small particles with very small spaces.
Clayey soil also contains very little humus.
Clayey soil has very good water holding capacity due to its very small and tightly packed particles.
Clayey soil is more fertile than loamy soil.
Which of the following present in soil has the smallest size of particles?
Gravel
Silt
Clay
Sand
200 ml of water takes 40 minutes to percolate completely in a particular soil. Calculate the percolation rate of water in the soil?
5 ml / min
800 ml / min
50 ml / min
160 ml / min
The rotten dead matter in the soil is called:
Organic matter
Sand
Humus
Silt
Different layers of the soil differs in feels colours, depth and chemical composition are:
Horizons
Soil profile
Weathering
Can’t say
Soil is formed from the parent rock material by a very slow and gradual process called:
Processing
Weathering
Breaking
Cutting
Which type of soil retains the highest amount of water ?
Clayey soil
Sandy soil
Loamy soil
None of these
The proportion of sand, silt and clay in a soil sample determines
Which of the following type of soil will form a colloidal solution when suspended in water?
Clay
Silt
Sand
Gravel
In which horizon of soil minerals are found?
A
B
C
None of these
Which one of the following is a step in the formation of soil?
Earthquakes or volcanic eruptions
Weathering of rocks
Addition of humus
All are involved in the formation of soil
The forumla used to calculate the rate of percolation is:
Percolation rate = amount of water (ml) percolation time (min)
Percolation rate = amount of water X percolation time 1
Percolation rate = amount of water X percolation time
None of these
Soil conservation measures are mainly aimed at protecting which of the following?
Plants
Topsoil
Sub soil
Soil organisms
The colour of red soil is due to presence of:
Minerals
Iron oxide
Vitamins
None of these
Clay particles are of size
More than 0.004 mm
Less than 0.04 mm
More than 0.02 mm
Less than 0.002 mm
Which factor influences soil formation?
Climate
Vegetation
Parent rock
All of these
Availability of water and minerals in the soil for maximum absorption by roots is in the:
B-horizon
C-horizon
A-horizon
Surface of soil
Which physical property of soil is important to us?
Texture
Water holding capacity
Both of these
None of these
The microorganisms present in the soil require moisture or water and nutrients for growth and survival. Choose from the options below, the habitat or place where the soil has plenty of water and nutrients:
Desert
Forest
Open field
Cricket ground
200 grams of a soil is taken and dried completely in bright sunshine. The mass of dried soil is found to be 170 grams. Calculate the percentage of water or moisture present in the given sample of the soil.
30 percent
15 percent
40 percent
25 percent
