Soil

On pouring water through soil in a funnel, if 'U' is the initial volume and 'V' is the final volume, what will be the percentage of water absorbed by the soil?

1. (U-V)/weight of soil x 100
2. weight of soil/(U-V) x 100
3. U/V x 100
4. V/U x 100

A soil sample takes 15 minutes to percolate 300 ml of water. Its rate of percolation will be

1. 10 ml/min
2. 15 ml/min
3. 25 ml/min
4. 20 ml/min

Soil profile is a-

1. Horizontal section through different layers of soil
2. Diagonal section through different layers of soil
3. Vertical section through different layers of soil
4. Transverse section through different layers of soil

Match: 1.Gram (A)Loamy soil, 2.Cotton (B)Clayey and loamy soil, 3.Lentil (C)Clayey soil rich in organic matter, 4.Paddy (D)Sandy soil

1. 1-B, 2-A, 3-A, 4-C
2. 1-B, 2-A, 3-A, 4-C
3. 1-B, 2-A, 3-A, 4-C
4. 1-B, 2-A, 3-A, 4-C

The soil rich in clay and organic matter is best suited for which kind of crop?

1. Pulses
2. Paddy
3. Cotton
4. Wheat

What does PVC stand for?

1. Polyvinyl Chloride
2. Pent Vinyl Chloride
3. Phenyl Vanadium Chloride
4. Poly Vanadium Chloride

On heating the soil sample in the boiling tube what will you observe?

1. It starts boiling
2. No change in the sample
3. Water vapours condense on the cooler inner walls of upper part of boiling tube
4. Soil particles start vaporizing

Many living organisms such as worms, rodents, moles & beetles and roots of small plants are found in

1. B-horizon
2. Topsoil
3. Bedrock
4. C-horizon

The layers in the soil profile differs in

1. texture, size
2. colour, height, texture
3. water content, colour, size
4. texture, colour, depth and chemical composition

The soil which occurs as a deposit in river beds:

1. Loamy
2. Sandy
3. Silt
4. Clay

___ soils are heavy as they hold water, have little air

1. Loamy
2. Clay
3. Sandy
4. Silt

A vertical section through different layers of the soil is called:

1. Soil Profile
2. Horizons
3. Bed rock
4. Soil layers

Which kind of soil is used for making matki and surahi etc.?

1. Clayey soil
2. Red soil
3. Black soil
4. Sandy soil

The mixture of rock particles and ___ is called the soil

1. Humus
2. Clay
3. Minerals
4. Water

On hot summer day air above the soil seems to shimmer because of

1. Shiny surface of the soil reflects
2. Air becomes mirror like
3. Water vapours coming out of soil are reflected by the sunlight
4. All the above

Soil erosion can be prevented by

1. Planting more trees
2. Cutting down trees
3. Deforestation
4. None of these

Removal of land surface by water, ice or wind is known as

1. Weathering
2. Deforestation
3. Erosion
4. Evaporation

Unit of percolation rate of water in soil is:

1. (ml/sec)
2. (ml/min)
3. (g/min)
4. (g/sec)

Lentils and other pulses grow well in ___ soils, which drain water easily

1. Loamy
2. Clayey
3. Sandy
4. None of the above

Rate of percolation of water in soil can be calculated by which formula?

1. Percolation rate (g/sec) = Amount of soil(g)/Percolation time(sec)
2. Percolation rate (min/q) = Percolation time(min)/Amount of minerals(g)
3. Percolation rate (mL/min) = Amount of water(ml)/Percolation time(min)
4. Percolation rate (min/mL) = Percolation time(min)/Amount of water(ml)

___ Soil is a mixture of sand, clay and silt

1. Loamy
2. Clayey
3. Sandy
4. Black

The classification of soil is done on the basis of proportion of particles of various

1. Shapes
2. Sizes
3. Concentration
4. Solubility

The ___ makes the soil fertile and provides nutrients to growing plants

1. Water
2. Clay
3. Humus
4. Sand

Match the following: (i) Mixture of rock particles and humus (ii) Soil (iii) Hard layer of soil (iv) Deposits in river beds

1. (i)-A, (ii)-D, (iii)-C, (iv)-B
2. (i)-B, (ii)-C, (iii)-D, (iv)-A
3. (i)-D, (ii)-A, (iii)-B, (iv)-C
4. (i)-C, (ii)-D, (iii)-A, (iv)-D

The process of formation of soil by the breaking down of rocks by the action of wind, water and climate is called

1. Weathering
2. Erosion
3. Filtration
4. Evaporation

Soil is composed of distinct layers; the topmost layer consists of rotting dead matter called ___

1. Clay
2. Humus
3. Sand
4. Gravel

Select the correct alternative: (i) Soil is the home for many organisms (ii) The top layer of the soil is humus (iii) Polythene bags and plastics pollute the soil (iv) The soil which contains greater proportion of big particles is called clayey soil

1. (i) & (ii)
2. (i), (ii) & (iii)
3. (iii) & (iv)
4. All of the above

The natural resource which supports in supplying water and nutrients to plants is:

1. Soil
2. Coal
3. Oil
4. Water