Tag: soil : our life

Quizzes (12) Questions (114)

Questions Related to soil : our life

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The type of soil which can hold water for more time have 

  1. Lower percolation rate

  2. Higher percolation rate

  3. Intermediate percolation rate

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

Percolation rate of a soil is the water absorption rate of the soil. It depends on the composition of the soil. It is different for different types of soil. Hence, it helps in selection of proper soil for the crop growth. Soil with lower percolation has high water retention capacity whereas soil with high percolation has low water retention capacity. Lower percolation rate refers that the soil can hold water for more time while higher percolation rate refers that the soil can hold water for less time. 

Thus, the correct answer is option A. 

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The rate of water absorption by the soil defines the 

  1. Rate of water movement

  2. Rate of seeping

  3. Rate of percolation

  4. Rate of absorption
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Percolation rate of a soil is the rate of water absorption by the soil. It depends on the composition of the soil. It is different for different types of soil. Hence, it helps in selection of proper soil for the crop growth. Soil with lower percolation rate has high water retention capacity whereas soil with high percolation rate has low water retention capacity. 

Thus, the correct answer is option C. 

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

Good soil is the one which

  1. Allows water to percolate slowly

  2. Allows water to pass quickly

  3. Allows limited amount of water into it

  4. Holds whole of water entering it
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Good agricultural soil should allow water to percolate slowly so that it remains available to plant roots for a longer duration, rather than draining away too quickly or waterlogging.

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

A fertile agricultural soil appears deep coloured at the surface as compared to soil one metre down. The reason for colour of top soil is

  1. More moisture

  2. Rich in organic matter

  3. Rich in iron, calcium and magnesium

  4. Recent formation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The dark color of topsoil is primarily due to the presence of humus, which is decomposed organic matter.

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The principal cation in alkaline soil is 

  1. Na$^+$

  2. K$^+$

  3. Ca$^{2+}$

  4. Any of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Alkaline soils are clay soils with high pH, a poor soil structure and a low infiltration capacity.pH of alkaline soil is  > 8.5, 
  • The principal cation in alkaline soil is Ca2+ because alkaline soils are primarily caused by a calcium carbonate-rich parent material weathering (developing) in an arid or dry environment.
  • Hence the principal cation in alkaline soil is  Ca2+.
  • So, the correct answer is 'Ca2+'.
Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

Soil salinity is measured by

  1. Porometer

  2. Potometer

  3. Calorimeter

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

Soil salinity can be measured by conductivity meter, it is a device which measures electrical conductivity in a solution due to presence of salts or impurities

So, the correct answer is 'Conductivity meter'