Author

Cyril G. Hopkins

3 free books by Cyril G. Hopkins, free to read online. Chapter 1 of any book is free, no account needed.

Writes aboutSoils Nitrogen-fixing microorganisms Nitrifying bacteria Fertilizers Agriculture

The Farm That Won't Wear Out

The Farm That Won't Wear Out

Cyril G. Hopkins

The Story of the Soil; from the Basis of Absolute Science and Real Life

The Story of the Soil; from the Basis of Absolute Science and Real Life

Cyril G. Hopkins

Cover of Nitrogen Bacteria and Legumes
With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils

Nitrogen Bacteria and Legumes With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils

Cyril G. Hopkins