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Soil: More than just a bunch of dirt. What is soil made of?. The basic components of soil are: decayed remains of once living organisms (organic material) rock water air. Layers of soil. Humus Topsoil Subsoil Bedrock. Humus. Living material Plants Decaying leaves Needles Moss
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What is soil made of? • The basic components of soil are: • decayed remains of once living organisms (organic material) • rock • water • air
Layers of soil • Humus • Topsoil • Subsoil • Bedrock
Humus • Living material • Plants • Decaying leaves • Needles • Moss • Thin layer • Dark color
Topsoil • Mostly minerals • Plant roots • Dark color • Decaying plants • Decaying animals
Subsoil • Silt • Sand • Clay • Not broken down all the way
Bedrock • Lowest layer of soil • Solid rock layer