Tag: soil profile

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Questions Related to soil profile

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

Soil suitable for cultivation of tobacco, vegetables and paddy

  1. Black soil

  2. Red soil

  3. Alluvial soil

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

Red soil is a mixture of loamey and yellow soils. It is suitable for the cultivation of tobacco, vegetables and paddy.

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

Deep black soil is considered to be highly productive due to high proportion of

  1. Silt and earthworm

  2. Clay and humus

  3. Gravel and Ca$^{2+}$

  4. Sand and Zn$^{2+}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Black soil is dark brown or black colour soil. The black colour is due to organic matter and clay content. Such soils are compact with good hydration, but little aeration; chemically they are very fertile, because of rich mineral content. Rich mineral content of black soils is due to clay, which adsorbs minerals on its surface. Clay and humus produce colloidal complex for holding water and ions and forming soil crumbs.

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

Deep black soil is considered to be highly productive due to high proportion of


  1. Silt and earthworm

  2. Clay and humus

  3. Gravel and Ca++

  4. Sand and Zn
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

(b) Black soil predominantly with clay and humus. This soil is very fertile because most of minerals are present in it. 

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

Deep black soil is productive, due to high proportion of

  1. Sand and Zinc

  2. Gravel and Calcium

  3. Clay and Humus

  4. Silt and Earthworm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Black soil (Regur) is highly productive due to its high clay content, which retains moisture, and its richness in organic matter (humus) and minerals.

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

Soil rich in Fe and Al is due to excessive leaching is

  1. Alluvial

  2. Laterite

  3. Loam

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Laterite soil is formed in tropical regions with high rainfall, where intense leaching removes silica and leaves behind iron (Fe) and aluminum (Al) oxides.

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

Which of the following is not correctly matched?

  1. Laterite- Contains aluminium

  2. Terra Rosa- Most suitable for roses

  3. Chernozem- Richest soil

  4. Black Cotton soil- Rich in calcium carbonate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Laterite is a soil and rock type rich in iron oxide. It is reddish in colour. 

Terra rossa is a well-drained, red soil with neutral pH. It is seen in the Mediterranean region. It contains sand, silt clay and organic material. It is most suitable for roses. 
Chernozem is a black colour soil having a high percentage of humus. It also contains a high percentage of phosphoric acids, phosphorus and ammonia. This makes it the richest soil and is highly fertile.
Black cotton soil is formed by lava basaltic rocks. It is very dark in colour. It is rich in calcium and magnesium carbonate. 
Thus, the correct answer is 'Laterite - Contains aluminium.'

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

Match the columns of size with soil particles

Column 1 (size) Column 2 (soil particle)
a. 0.2 - 2.00 mm (i) Silt
b. Less than 0.002 mm (ii) Clay
c. 0.02 - 0.2 mm (iii) Coarse sand particles 
d. 0.02 - 0.02 mm (iv) Fine sand particles

  1. a- iv, b- i, c- iii, d- ii

  2. a- iii, b- ii, c- iv, d- i

  3. a- ii, b- iii, c- iv, d- i

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

Soil texture refers to the relative proportion of particles or it is the relative percentage by weight of the three soil separates i.e., sand, silt and clay or the size of soil particles. According to the International system, 

Clay< 0.002 mm
Silt 0.002 - 0.02 mm
Fine sand 0.02 - 0.2 mm
Coarse sand 0.2 -  2 mm
The proportion of each size group in a given soil (the texture) can not be easily altered and it is considered as a basic property of a soil.
Therefore, the correct answer is option B.