Get premium membership and access questions with answers, video lessons as well as revision papers.
The features of true soil are minerals, bacteria and organic materials, air and moisture.
1. Minerals, which come from rock, become part of the soil when the rock is broken down into smaller particles called sand, silt or clay. Many of these minerals for instance calcium, phosphorus and potassium provide nutrients to plants.
2. When organic materials that is plants and animals, die they are decomposed by bacteria in the soil. As bacteria breakdown these organic materials, huus is formed. Humus provides nutrients and moisture for plants and gives the soil its dark colour.
3. Plants need air around their roots. Humus helps produce the air in the soil because the loose, decaying materials allow for many air pockets. Insects, worms and small animals that tunnel through the soil also provide air spaces.
4. Moisture that is water, dissolves nutrients in the soil and is taken up by plants through their roots. Moisture is necessary for plant survival and for the chemical and physical processes that weather rock and decay organic materials.
eddynightsy answered the question on April 16, 2018 at 13:23
- Which are the four layers in the outer surface of the earth?(Solved)
Which are the four layers in the outer surface of the earth?
Date posted: April 14, 2018. Answers (1)
- What is the difference between Gulf and Bay?(Solved)
What is the difference between Gulf and Bay?
Date posted: April 14, 2018. Answers (1)
- What is a cape?(Solved)
What is a cape?
Date posted: April 14, 2018. Answers (1)
- What is Yardang?(Solved)
What is Yardang?
Date posted: April 14, 2018. Answers (1)
- Differentiate between absolute humidity and relative humidity.(Solved)
Differentiate between absolute humidity and relative humidity.
Date posted: April 14, 2018. Answers (1)
- Give four reasons why some areas around the equatorial belt do not experience true equatorial climate(Solved)
Give four reasons why some areas around the equatorial belt do not experience true equatorial climate.
Date posted: April 14, 2018. Answers (1)
- Define the term field work(Solved)
Define the term field work.
Date posted: April 14, 2018. Answers (1)
- Define the term map(Solved)
Define the term map.
Date posted: April 14, 2018. Answers (1)
- What is the difference between longitude and latitude?(Solved)
What is the difference between longitude and latitude?
Date posted: April 14, 2018. Answers (1)
- Explain the effects of faulting on the landscape(Solved)
Explain the effects of faulting on the landscape
Date posted: April 14, 2018. Answers (1)
- List six elements of weather(Solved)
List six elements of weather.
Date posted: April 13, 2018. Answers (1)
- List down four topics covered under practical geography(Solved)
List down four topics covered under practical geography.
Date posted: April 13, 2018. Answers (1)
- Give three forces that give the earth it's oblate shape(Solved)
Give three forces that give the earth it's oblate shape.
Date posted: April 13, 2018. Answers (1)
- Name two planets without satellites(Solved)
Name two planets without satellites.
Date posted: April 13, 2018. Answers (1)
- State two theories used to explain the evolution of the solar system(Solved)
State two theories used to explain the evolution of the solar system.
Date posted: April 13, 2018. Answers (1)
- Explain the effects of ITCZ (Intertropical Convergence Zone)(Solved)
Explain the effects of ITCZ (Intertropical Convergence Zone).
Date posted: April 12, 2018. Answers (1)
- In air transport, what does the term "Miscellaneous Charges Order" mean?(Solved)
In air transport, what does the term "Miscellaneous Charges Order" mean?
Date posted: April 12, 2018. Answers (1)
- What is intensive subsistence agriculture?(Solved)
What is intensive subsistence agriculture?
Date posted: April 12, 2018. Answers (1)
- Explain the benefits of dams along River Tana(Solved)
Explain the benefits of dams along River Tana.
Date posted: April 11, 2018. Answers (1)
- Give two sources of information that you would use in preparation of a field study of an area recently affected by intense earthquake(Solved)
Give two sources of information that you would use in preparation of a field study of an area recently affected by intense earthquake.
Date posted: April 11, 2018. Answers (1)