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Soil Formation

6.2 Vocabulary Review

soil the loose, weathered material on Earth's surface in which plants can grow
bedrock the solid layer of rock beneath the soil
humus dark-colored, decayed organic material in soil
fertility a measure of how well soil supports plant growth
loam rich, fertile soil that is made up of about equal parts of clay, sand, and silt
soil horizon the layer of soil that differs in color and texture from the layers above or below it
topsoil mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil
subsoil the layer of soil beneath the topsoil that contains mostly clay and other minerals
litter the loose layer of dead plant leaves and stems on the surface of the soil
decomposer soil organism that breaks down the remains of organism and digests them
Created by: anorris