Pioneering soil microbiologist, Dr. Elaine Ingham teaches us about "The Life in the Soil" in Part 3, "The Proper Biology."

Pioneering soil microbiologist, Dr. Elaine Ingham teaches us about "The Life in the Soil" in Part 4, "What is Soil?"

In Part 5 of this series, Dr. Elaine Ingham, B.A., M.S., PhD. describes differences in soil productivity by explaining the foundations for growth and how they are established, maintained and restored in various soil types and ecosystems.

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