Draw a labelled diagram to show the main features of a podzol soil. - Leaving Cert Agricultural Science - Question c - 2008
Question c
Draw a labelled diagram to show the main features of a podzol soil.
Worked Solution & Example Answer:Draw a labelled diagram to show the main features of a podzol soil. - Leaving Cert Agricultural Science - Question c - 2008
Step 1
O - organic horizon/peat layer
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This layer consists primarily of decomposed organic matter, such as leaves and plant materials. It serves as a crucial source of nutrients for the soil and is typically dark in color due to the accumulation of humus.
Step 2
A - bleached horizon/topsoil
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This horizon is characterized by its lighter color, resulting from leaching, which removes minerals and organic materials. This layer may be low in nutrients and is often where plants first anchor their roots.
Step 3
B - iron pan/subsoil
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The iron pan horizon is a hardened layer formed by the accumulation of iron and other minerals. It restricts water drainage and root growth, making it less favorable for plant life.
Step 4
C - parent material/bedrock
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This layer, found beneath all other soil horizons, consists of the original rock material from which the soil has formed through weathering processes. It provides essential minerals that eventually reach the upper soil layers.
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