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Soil Vocabulary

soil the loose, weathered material on Earth's surface in which plants can grow
bedrock the solid layer of rock beneath the soil
humus a dark-colored substance that forms as plant and animal remains decay
fertility a measure of how well the soil supports plant growth
loam soil that is made up of about equal parts of clay, sand, and silt
pH scale measures acidity
soil horizon a layer of soil that differs in color, texture, and composition from the layers above or below it
topsoil a crumbly, dark brown soil that is a mixture of humus, clay, and other materials
subsoil usually consists of clay and other particles of rock, but little humus
decomposer the organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals
Created by: Sam Pendo