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Olympiad Test: Soil


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10 Questions MCQ Test Science & Technology for UPSC CSE | Olympiad Test: Soil

Olympiad Test: Soil for UPSC 2023 is part of Science & Technology for UPSC CSE preparation. The Olympiad Test: Soil questions and answers have been prepared according to the UPSC exam syllabus.The Olympiad Test: Soil MCQs are made for UPSC 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Soil below.
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Olympiad Test: Soil - Question 1

The uppermost fertile layer of earth crust is called

Detailed Solution for Olympiad Test: Soil - Question 1

Soil is a mixture of clay, rocky particles and organic remains of plants and animals. It forms the upper layer of the surface of the earth i.e. it covers the land. Soil is formed from the weathering of rocks. Different types of soils are present depending upon the climatic conditions of the place and different composition of gravel, clay etc. in the soil. The topmost layer of soil called humus is the most fertile as it contains nutrients for the growth of plants. Soil is a shelter for many microorganisms. Hence, soil is an important natural resource.

Olympiad Test: Soil - Question 2

The water holding capacity is the highest in

Detailed Solution for Olympiad Test: Soil - Question 2

The amount of water retained by soil per unit volume is called as water holding capacity. It is highest in the clayey soil.

Olympiad Test: Soil - Question 3

In addition to the rock particles, the soil contains

Detailed Solution for Olympiad Test: Soil - Question 3

In addition of the rock particles, the soil contains minerals, organic matter, air and water.

Olympiad Test: Soil - Question 4

Which layer is formed of decayed organic matter?

Detailed Solution for Olympiad Test: Soil - Question 4

The decayed organic matter in the soil form humus which is black in colour.

Olympiad Test: Soil - Question 5

Soil erosion is a process of

Detailed Solution for Olympiad Test: Soil - Question 5

The process of removal of top soil due to action of air, water etc. is called soil erosion.

Olympiad Test: Soil - Question 6

-------------- are soils in which more than half of the parent mineral matter is volcanic ash and appear very dark in colour.

Detailed Solution for Olympiad Test: Soil - Question 6

Volcanic soils are soils in which more than half of the parent mineral matter is volcanic ash ans appear very dark in colour.

Olympiad Test: Soil - Question 7

Breaking down of big pieces of rock into smaller pieces is called

Detailed Solution for Olympiad Test: Soil - Question 7

The process of breaking down big pieces of rock into smaller pieces is called weathering.

Olympiad Test: Soil - Question 8

Which soil is made from basaltic rock?

Detailed Solution for Olympiad Test: Soil - Question 8

Type of soil depends upon the rock from which soil is formed. Basaltic rock forms the black soil.

Olympiad Test: Soil - Question 9

Soil best suited for cultivation of wheat, rice and sugarcane is

Detailed Solution for Olympiad Test: Soil - Question 9

The soil suited for cultivation of wheat, rice and sugarcane is called alluvial soil.

Olympiad Test: Soil - Question 10

Red soil In which horizon of soil weathering is taking place?

Detailed Solution for Olympiad Test: Soil - Question 10

The weathering of soil takes place in O-horizon of soil profile.

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