Agricultural Soil Science Quiz: Multiple Choice Questions

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Name	Agricultural Soil Science Quiz (Multiple Choice Objective Questions)
Type	Online Mock Test
Number of questions	15
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Also read: Soil Science MCQ: Multiple Choice Questions

Agricultural Soil Science MCQ

Question 01. What is petrology?

(a). Study or description of rocks.
(b). Study of the origin of rocks.
(c). Study of soil minerals.
(d). Study of the origin of soil.

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Question 02. Who defines soil as a nutrient bin?

(a). Whitney, 1892.
(b). Dokuchaiev, 1900.
(c). Simonson, 1957.
(d). Soil Science Society of America, 1970.

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Question 03. Match the followings:

A	Podzolization	1	Process that removes silica from the upper layers
B	Laterization	2	Process of eluviation of oxide of iron and aluminium
C	Salinization	3	Process of accumulation of salts
D	Alkalization	4	Process by which soils with high exchangeable sodium and pH are formed

(a). A : 1, B : 2, C : 3, D : 4.
(b). A : 2, B : 1, C : 3, D : 4.
(c). A : 3, B : 1, C : 2, D : 4.
(d). A : 4, B : 1, C : 3, D : 1.

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Question 04. Which is true about soil order?

1. There are 12 taxa.
2. Soil orders are based mainly on morphology.
3. There are 50 taxa in soil order.
4. Great group is subdivision of great group.

(a). Only 1 is true.
(b). Only 2 and 3 are true.
(c). Only 3 and 4 are true.
(d). Only 1 and 2 are true.

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Question 05. Which is truly matched?

Soil horizons and descriptions.

1. A horizon: Organic horizon.
2. E horizon: Mineral horizon.
3. C horizon: Hard bedrock.
4. R horizon: Horizons or layers excluding hard bed rock.

(a). 1 is not true.
(b). 2 is true.
(c). a and b are true.
(d). 3 and 4 are true.

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Soil Science Quiz

Question 06. According to the land capability classification, which category of land is subject to severe erosion though it is suitable for cultivation?

(a). Class I.
(b). Class II.
(c). Only class III.
(d). Class III and Class IV.

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Question 07. According to the types of soil structure, what is the size of peds in block like structure?

(a). 1 to 10 cm.
(b). 0.1 to 1 cm.
(c). 0.01 to 0.01 cm.
(d). None of the above.

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Question 08. Which is true?

1. Wet soil: Stickiness and plasticity are the major characteristics.
2. Moist soil: adheres very strongly and resists crushing between the thumb and forefinger.
3. Dry soil: the degree of resistance of the dry soil is related to the attraction of particles for each other.

(a). Only 1 is true.
(b). Only 2 is true.
(c). Only 3 is true.
(d). All are true.

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Question 09. What is the bulk density of decomposed peat?

(a). 0.66 g/cm³.
(b). 0.55 g/cm³.
(c). 0.77 g/cm³.
(d). 0.33 g/cm³.

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Question 10. What is the size of capillary pores?

(a). 0.06 mm.
(b). More than 0.06 mm.
(c). Less than 0.06 mm.
(d). Any of the above.

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Soil Science Online Mock Test

Question 11. What is the soil colour name for the numerical notation 2.5 YR 5/6?

(a). Yellow.
(b). Red.
(c). Both a and b.
(d). Either a or b.

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Question 12. Soil temperature doubles for every how many degrees of increase in temperature?

(a). 1 °C.
(b). 5 °C.
(c). 10 °C.
(d). 16 °C.

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Question 13. Who proposed the Electric resistance block method of soil moisture measurement?

(a). Bouyoucos and Mick.
(b). Arnold.
(c). Russell.
(d). Munsell.

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Question 14. Consider about 1:1 layer silicates:

1. Kaolinite group is the most prominent 1:1 clay mineral.
2. These have 2 Si tetrahedral and 1 Al octahedral sheet per crystalline unit.
3. These layers are held together by hydrogen bonding.
4. The effective surface of kaolinite is restricted to its inner faces.
5. Kaolinite crystals usually are rectangular in shape.
6. Kaolinite particles are readily broken down into extremely thin plates.

(a). Only 1, 2 and 5 are true.
(b). Only 1, 3 and 4 are true.
(c). Only 1 and 5 are true.
(d). Only 1 and 3 are true.

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Question 15. What happens when pH range is 6-7?

(a). Phosphorus fixation is at minimum and availability to higher plants is maximum.
(b). phosphorus fixation is at maximum and availability to higher plants is maximum.
(c). Phosphorus fixation is at minimum and availability to higher plants is minimum.
(d). None of the above.

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Reference

09: Donahue, Miller and Shickluna (1977). p 60.