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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When we think of scientists, we often imagine people wearing white coats, shut up in a laboratory working with test…
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The magnetic minerals of the rocks contains a veritable repository of information about its birth, history and evolution...
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This image was taken by the ASTER sensor installed on the NASA TERRA satellite platform. The image was taken on…
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Have you ever wondered how much space is taken up by an apple or a steak?...
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According to the international journal Nature, the year that has just begun will bring with it major scientific and technological…
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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...
-
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...