SOIL LAYERS

O HORIZON

• The "O" stands for organic matter.
• It's the very first layer of soil.
• It's made up of dried leaves and animal carcasses.
• The O horizon contains humus.
• Animals build there homes in the O horizon.

A HORIZON

• The "A" horizon is referred to as topsoil.
• Worm, spiders, and roots can be found here.
• This layer is darker because of more decomposition.
• This layer is very rough.
• It's very rough from erosion, erosion caused it to loose fine minerals.

E HORIZON

• The "E" is short for eluvaited.
• This layer has been drain of clay, iron, and aluminum oxides
• The "E" horizon is a lighter pale color.

"B" HORIZON

• B horizon is sometimes called subsoil.
• The B horizon will usually have stronger colors.
• This layer contains mineral deposits.
• It gets those from the layers above when the water drips down

"C" HORIZON

• It is sometimes called regolith.
• It has some broken - up pieces of bedrock.
• Plant roots don't penetrate into this layer.
• There is very little organic matter in this layer.

"R" HORIZON

• This layer in bedrock.
• This is unweathered rock.
• This layer is beneath all the other layers .

BIBLIOGRAPHY

• www.enchantedlearning.com/geology/soil/
• en.wikipedia.org/wiki/Soil_horizon