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Soil Formation

Soils may form from:

Soil Forming Factors:

The Five Factors:

Soil is produced by the interaction of five soil forming factors:
Thirty thousand years of soil formation in 5 seconds!
mineral material such as volcanic ash
weathered rock or alluvium (river or stream deposits)
organic material, most often peat formed from swamp or bog vegetation
climate - temperature and rainfall
parent material - the type of material in which the soil is formed (eg clay, sand, peat)
living organisms - play a major role in the cycling of nutrients
topography - controls the movement of water, and largely determines erosion patterns.
time - how long the soil has had to form and develop
Instructions: Go to the Next Topic, or select from the menu to look at further detail of these soil forming factors.