How long does it take to form?
The time needed to form a soil depends on the latitude:
- in environments characterized by a mild climate, it takes 200-400 years to form 1 cm of soil
- in wet tropical areas soil formation is faster, as it takes 200 years
- in order to accumulate enough substances to make a soil fertile it takes 3000 years.
For these reasons the soil is considered as a non-renewable resource: once it has been destroyed, it is lost forever.
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28 August 2020
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This image was taken by the ASTER sensor installed on the NASA TERRA satellite platform. The image was taken on…
15 July 2020
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Remote satellite sensing: what it is and what it is used for In the scientific field, the images produced by…
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From the Multimedia section
Facts
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Laterite and bauxite deposits
These deposits can be observed in those tropical areas that are characterized by...
And in underground tunnels?
There are groups of terrestrial animals that eat insects, worms and other invertebrates...
What about the permafrost?
In Sub Arctic Swedish regions, some scientists studied the changes of permafrost...
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The most populated cities in the world
In the last 50 years the world population has passed from 2.5 billion to 6 billion...
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Mountains on the Earth
The different landscapes that we analysed in the previous section are distributed...
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24 February 2011
Laterite and bauxite deposits
These deposits can be observed in those tropical areas that are characterized by...
And in underground tunnels?
There are groups of terrestrial animals that eat insects, worms and other invertebrates...
-
What about the permafrost?
In Sub Arctic Swedish regions, some scientists studied the changes of permafrost...
-
The most populated cities in the world
In the last 50 years the world population has passed from 2.5 billion to 6 billion...
-
24 February 2011
Laterite and bauxite deposits
These deposits can be observed in those tropical areas that are characterized by...
-
And in underground tunnels?
There are groups of terrestrial animals that eat insects, worms and other invertebrates...
-
What about the permafrost?
In Sub Arctic Swedish regions, some scientists studied the changes of permafrost...