the loose, weathered material on earth's surface in which plants can grow

rock that makes up earth's crust, also the solid rock layer beneath the soil.

dark- colored organic material in soil.

a measure of how well soil supports plant growth.

rich fertile soil that is made up of about equal parts clay, sand, and silt.

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how soil forms

chapter 2 lesson 2 : how soil forms

Term	Definition
soil	the loose, weathered material on earth's surface in which plants can grow
bedrock	rock that makes up earth's crust, also the solid rock layer beneath the soil.
humus	dark- colored 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 clay, sand, and silt.
pH scale
soil horizon
topsoil
subsoil
decomposer