Includes bibliographical references (page 23) and index.
Summary:
Explore soil's layers from the nutrient-rich topsoil to the rocky base. Learn about the cycle of life and decay, soil's organic and inorganic materials, and the ways soil supports life on Earth. Additional features include a diagram labeling each of the layers, Fast Facts, a phonetic glossary, an index, an introduction to the author, and further sources for learning.-- Amazon.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.