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Soil Properties MCQ Exam

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

Which soil separate has the highest surface area per gram?

a)

Sand

b)

Silt

c)

Clay

d)

Gravel

2.

The sticky and plastic property of soil is primarily due to:

a)

Sand

b)

Silt

c)

Clay

d)

Organic matter

3.

In the Munsell Color System, the term "hue" refers to:

a)

Lightness or darkness

b)

Purity or intensity of color

c)

Dominant spectral color

d)

Soil drainage condition

4.

A soil with a notation of 5YR 3/4 has "3" representing:

a)

Hue

b)

Value

c)

Chroma

d)

Intensity

5.

Which soil color generally indicates high organic matter content?

a)

Gray

b)

Red

c)

Dark brown to black

d)

Yellow

6.

A poorly-drained soil commonly exhibits:

a)

Reddish color

b)

Black color

c)

Gray mottles

d)

Yellowish color

7.

Which structural type is best for favorable plant growth?

a)

Massive

b)

Platy

c)

Granular

d)

Prismatic

8.

Which soil structure is cube-like with sharp corners?

a)

Angular blocky

b)

Subangular blocky

c)

Prismatic

d)

Columnar

9.

Columnar soil structure is similar to prismatic except that it has:

a)

Flat tops

b)

Rounded tops

c)

No distinct shape

d)

Single grains

10.

The soil structure commonly seen in sandy soils is:

a)

Massive

b)

Single grain

c)

Platy

d)

Granular

11.

Which soil property describes the cohesive and adhesive forces holding soil particles together?

a)

Soil texture

b)

Soil consistence

c)

Soil structure

d)

Soil porosity

12.

Which soil moisture condition is described as "friable"?

a)

Wet soil

b)

Moist soil

c)

Dry soil

d)

Plastic soil

13.

Which soil consistence term is associated with molding clay pots?

a)

Hard

b)

Friable

c)

Plastic

d)

Viscous

14.

A soil is well-aggregated when it is rich in:

a)

Sodium

b)

Calcium

c)

Potassium

d)

Magnesium

15.

Sodium-rich soils are often:

a)

Well-aggregated

b)

Dispersed

c)

Granular

d)

Friable

16.

Particle density of most agricultural soils is approximately:

a)

1.65 g/cm³

b)

2.65 g/cm³

c)

3.65 g/cm³

d)

4.65 g/cm³

17.

Which formula is used to compute bulk density?

a)

Db = Ms/Vs

b)

Db = Ms/Vt

c)

Db = Vt/Ms

d)

Db = Ms - Vs

18.

A 100 cm³ soil core weighs 120 g when oven-dry. What is its bulk density?

a)

1.2 g/cm³

b)

12 g/cm³

c)

0.12 g/cm³

d)

2.1 g/cm³

19.

If bulk density is 1.3 g/cm³ and particle density is 2.6 g/cm³, what is the porosity?

a)

25%

b)

35%

c)

50%

d)

65%

20.

Which of the following decreases with soil compaction?

a)

Bulk density

b)

Porosity

c)

Soil solids

d)

Particle density

21.

A soil with high bulk density generally indicates:

a)

High porosity

b)

Well-aerated soil

c)

Compacted soil

d)

Loose soil

22.

Porosity is calculated as:

a)

P = (Db/Dp) × 100%

b)

P = 1 - (Db/Dp) × 100%

c)

P = Dp/Db × 100%

d)

P = (Db - Dp) × 100%

23.

The water retained in soil after gravitational water has drained away is called:

a)

Saturation

b)

Field capacity

c)

Hygroscopic water

d)

Permanent wilting point

24.

Which soil water form is unavailable to plants because it is tightly held to soil particles?

a)

Capillary water

b)

Hygroscopic water

c)

Gravitational water

d)

Available water

25.

Which soil water is drained freely by gravity?

a)

Capillary water

b)

Gravitational water

c)

Hygroscopic water

d)

Saturation water