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Science
Soil

Fallen leave make up an important part of the what horizon of soil?

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November 30, 2008 3:47AM

Soil is composed of organic and inorganic parts. Inorganic is weathered rock. Organic is dead or decaying organisms called humus. Fallen leaves are part of what makes up humus. Fallen leaves (as well as all humus) are found in the "O" horizon as well as the "A" horizon.