Tag: soil and crops

Questions Related to soil and crops

Why are earthworms important in soils?

evs soil : our life soil profile soil- our life soil and crops

  1. Earthworms are segmented which means that they cause more caverns for other bacteria

    and microbes to be present underground

  2. Earthworms produce fluids which enrich the soil aiding for nitrogen to be present for plant

    growth

  3. Earthworms inhibit gaseous exchange killing other bacteria which can be harmful to plants

  4. Earthworms ingest soil and excrete soil which allows for some chemicals to be

Show answer
Correct Option: B
Explanation:

Explanation: These burrows create pores through which oxygen and water can enter and carbondioxide can leave the soil. Earthworm casts (their faeces) are also very important in soils and are responsible for some of the fine crumb structure of soils.

In which one of the following pairs, is the specific characteristic of a soil not correctly matched?

evs soil : our life soil profile soil- our life soil and crops

  1. Chernozems - Richest soil in the world.

  2. Black soil - Rich in calcium carbonate and iron.

  3. Laterite - Contains aluminium compound.

  4. Terra rossa - Most suitable for roses.

Show answer
Correct Option: D
Explanation:

Chernozem is the black colored soil which is known for being rich in humus. This is the richest soil in the world and used for the cultivation of the cereals. Black soil is rich in calcium carbonate and iron. This soil also contains the lime, potash, aluminum, etc. Laterite soil contains the bauxite which is the ore of the aluminum. Terra Rossa is the red clayey soil. the soil formed from the limestone and is used for the production of the vine plants. 

Thus, the correct answer is option D. 

Which is not correctly matched ___________________.

evs soil : our life soil profile soil- our life soil and crops

  1. Laterite - Contains aluminium

  2. Terra rosa - Most suitable for roses

  3. Chernozen - Richest soil

  4. Black Cotton Soil - Rich in calcium carbonate

Show answer
Correct Option: B