Tag: mud and stones

Quizzes (6) Questions (113)

Questions Related to mud and stones

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Which of the following occurs as a deposit of river bed?

  1. Sand

  2. Clay

  3. Silt

  4. Silica
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Water contains lots of impurities inside it. it includes fine sand, clay and many other materials present in it. These are carried away by the flow of running water. They are then deposited or sedimented at the bottom of the water reservoirs.
  • This sedimentation forms silt. As it is present at the bottom, it is usually accumulated at the bed of the river. 
  • So, option C "Silt" is the correct answer.
Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

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

  1. Clay

  2. Humus

  3. Silt

  4. Loam
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • The different types of loam soils each have slightly different characteristics, with some draining liquids more efficiently than others. The soil's texture, especially its ability to retain nutrients and water are crucial.
  • Loam soil is a mixture of soil that is the ideal plant-growing medium. It is actually a combination soil, normally equal parts of clay, silt, and sand, which gives the benefits of each with few of the disadvantages.
So, the correct answer is 'Loam'.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

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

  1. Red soil

  2. Black soil

  3. Sandy soil

  4. Clayey soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sandy soil is made up of constituent particles that are relatively larger in size. The larger size of sandy particles leads to their lesser absorptive surface area. As a result, their water holding capacity is less. Their particles are larger and their inter particular space is more. So, air can move easily between these particles leading to proper aeration.  

All other soil types like red soil, black soil, and clayey soil have smaller particles and more absorptive surface area.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Humus is an example of

  1. Crystalloids

  2. Organic colloids

  3. Soil structure

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are four major types of colloids present in soil :

1. Layer silicate clays 
2. Iron and aluminum oxide clays (sesquioxide clays) 
3. Allophane and associated amorphous clays 
4. Humus. 
Layer silicate clays, iron and aluminum oxide clays, allophane and associated amorphous clays are inorganic colloids while humus is an organic colloid.
Therefore, the correct answer is option B. 

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Pure clay is not suitable for plant growth because

  1. It is chemically inert

  2. It is chemically active

  3. It forms a solid non penetrable mass

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Clay soil is soil that contains a high percentage of clay particles. It is slow to drain water and quick to harden leading to water logging. It blocks root absorption, which prevents plants from getting nutrients required for survival. Hence it is not suitable for plant growth. Thus the correct answer is option C.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Good soil is

  1. Which allows the limited amount of water into it

  2. Which allows to percolate the water slowly from it

  3. Which allows to pass water very quickly from it

  4. Which holds whole of water into it
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A good soil needs to be deep, fine-textured, moist, free-draining, loamy, and have an organic-rich topsoil. These properties best enable plant roots to take up nutrients, water and oxygen, and get enough support for rapid growth. In clay soils with small pore spaces, water moves slowly and spreads outward from where it is applied due to capillary action. In sandy soil, irrigation water can penetrate to 72 inches below the surface within 24 hours of application. In soils with a heavy clay content, water only penetrates to roughly 36 inches in 24 hours.

Therefore, the correct answer is option B.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Why is organic matter (humus) an important part of soil?

  1. It helps to improve water infiltration

  2. It can break down organic pollutants

  3. It converts nitrogen in the air into nitrates used by plants

  4. It is rich in nutrients, which is important for fertility
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Humus controls and regulates many soil functions, as well as plant growth. The better the humus count in the soil, the healthier and more productive soil will be. Regardless of the program one uses in farming operations, the higher the humus count, the better the crop is grown yield. Good humus count in the soil will hold soil moisture longer, thus less water is required for crop production. Also, good humus count reduces both water and wind erosion of soil.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

The soil near the surface is usually darker than about one meter down, this is because the top soil


  1. Is richer in Ca and Mg

  2. Contains more organic matter

  3. Is wetter than the sub soil

  4. Is drier than the sub soil
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

(b) Top soil contains decomposed and amorphous organic matter composing of sand with humus.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Humus is defined as

  1. Physical texture of soil

  2. Chemical composition of soil

  3. Decomposed organic matter in soil

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Humus is the dark, organic material that forms in soil when plant and animal matter decays. It is a crucial component for soil fertility.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Precious stones, such as gem stones, are products of

  1. Volcanic rocks

  2. Sedimentary rocks

  3. Metamorphic racks

  4. Igneous rocks
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • A gemstone, also known as the precious stone, jewel, a gem is a piece of mineral crystal which is cut and polished and it is used to make jewellery or other accessories. Gemstones are formed from igneous rocks. Interlocking crystals grow within intrusive igneous rock and may form gemstones depending on elements present, cooling time and the environment.
  • Hence precious stones, such as gemstones, are products of igneous rocks.
  • So, the correct answer is 'Igneous rocks'.