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Physical geography.net: Introduction to Soils
A detailed primer on the composition of soil, its color, pH, texture, and its profile.
Utah Education Network
Uen: Investigation 6 Soil Profile
In this hands-on instructional activity, students investigate the properties of different layers of soil.
Utah Education Network
Uen: Soil Ingredients
Students are put into groups for this activity, and given a soil sample which they sort into rock particles and organic material.