Soil Profile

Q.

What are the major components of soil?

Q.

The rotting dead matter in the soil is called _________.

1. humus

2. mineral

3. rock

4. salt

Q. Soil supports the growth of plants by providing structural support and by supplying water, minerals and nutrients.

1. True
2. False

Q.

A certain sample of soil is used for testing the percolation rate. The amount of water taken is 400 ml and the percolation time measured is 10 mins. What is the percolation rate?

1. 40 mL

2. 40 mL/min

3. 20 min

4. 20 mL/min

Q.

In which layer of soil profile one would find litter and humus?

Q.

___ is the layer formed on soil due to the decomposition of dead organisms.

1. humus

Q. Soil profile means ______.

1. Composition of the soil
2. Texture of the soil
3. Layers of the soil
4. None of the above

Q. Soil has five components. The proportions of different components are

1. Mineral Matter-$40\%$, Organic Matter-$10\%$, Soil Moisture -$25\%$, Soil Atmosphere -$25\%$, Soil Organism- Variable
2. Mineral Matter-$40\%$, Organic Matter-$10\%$, Soil Moisture -$25\%$, Soil Atmosphere - $25\%$, Soil Organism- $10\%$
3. Mineral Matter-$40\%$, Organic Matter-$10\%$, Soil Moisture -$35\%$, Soil Atmosphere -$25\%$, Soil Organism- $10\%$
4. Mineral Matter-$30\%$, Organic Matter-$20\%$, Soil Moisture -$25\%$, Soil Atmosphere -$25\%$, Soil Organism- $10\%$

Q. The water holding capacity is the highest in________

1. clayey soil
2. loamy soil
3. mixture of sand and loam
4. sandy soil

Q. What do you understand by soil permeability? Explain by means of a diagram. [2 MARKS]

Q. Assertion :Temperature and soil moisture are the important climatic factors that regulate the process of decomposition. Reason: Warm and moist environment favours decomposition whereas low temperature and anaerobiosis inhibit decomposition.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Pick the correct term for "filtering down through the soil horizons"?

1. Aeration

2. Percolation

3. Irrigation

4. Absorption

Q.

Where is Gypsum most common found?

Q. .......... soil holds highest water capacity.

1. Sandy
2. Clayey
3. Loamy
4. Both A and C

Q. Which of the following layer of soil is called as zone of leaching?

1. $A_0$
2. $A_2$
3. $A_1$
4. $A_{00}$

Q. Sandeep has three soil samples X, Y and Z, each with weight 50 g. 100 mL of water is poured drop by drop with the help of a dropper on all the soil samples. The given graph shows weight of water absorbed by each soil samples.
Select the correct option regarding the soil samples.

1. X is a mixture of sand, silt and a good amount of clay.
2. Y is a mixture of sand, silt and appropriate amount of clay.
3. Z is a sandy soil with very little clay.
4. Z is a mixture of clay and slit with higher amount of sand.

Q.

What exactly results, once the foliation of metamorphic rock has taken place?

1. Minerals forms on top

2. Crystalized minerals appears as scattered

3. Crystalized minerals in bands

4. Crystalized minerals appears in patches

Q.

What do we understand by mafic composition of rocks?

1. Calcium-rich plagioclase feldspar

2. Only A

3. Dark silicate minerals

4. Both A & B

Q. .......... is a mixture of sand and clay.

1. Clay
2. Humus
3. Silt
4. Loam

Q. Major constituent of soil is

1. Organic matter
2. Inorganic matter
3. Soil air
4. Soil water

Q.

What is meant by soil profile? Explain.

Q. Which of the following soils cracks and shrinks most as it dries?

1. Porous soil
2. Clay soil
3. Loam soil
4. Sandy soil

Q. Which of the following provides shelter for many living organisms?

1. A-Horizon
2. B-Horizon
3. C-Horizon
4. None of the above

Q. .......... affect the soil profile and bring changes in soil structure.

1. Vegetation
2. Animals
3. Climatic factors
4. Fertilizers

Q. Maximum quantity of humus occurs in

1. Lowermost layer of soil
2. Upper layer of soil
3. Middle layer of soil
4. Same everywhere

Q. Column I represent the size of the soil particles and Column II represents type of solid components. Which of the following is correct match for the Column I and Column II.

	Column I		Column II
A.	0.2 to 2.00 mm	(i)	Slit
B.	Less than 0.002 mm	(ii)	Clay
C.	0.02 to 0.2 mm	(iii)	coarse sand praticle
D.	0.002 to 0.02 mm	(iv)	fine sand particle

1. A - (ii), B - (iii), C - (iv), D - (i)
2. A - (iv), B - (i), C - (iii), D - (ii)
3. A - (iii), B - (ii), C - (iv), D - (i)
4. None of the above

Q. Humification results in the formation of ............. substance.

1. Colloidal and Basic
2. Acidic and Dark colored
3. Amorphous and Light colored
4. Light coloured colloidal

Q. Which of the following show the correct arrangement of different layers of the soil?

1. Topsoil, Subsoil, Bedrock
2. Subsoil, Bedrock, Topsoil
3. Bedrock, Topsoil , Subsoil
4. Subsoil, Topsoil , Bedrock

Q. ........... is the collective name for layers of soil.

1. A-horizon
2. B-horizon
3. C-horizon
4. Soil profile

Q. .......... soils tend to be light, well aerated and rather dry.

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