Cyril G Hopkins

Cyril G Hopkins is the author of "The Farm That Won't Wear Out", "Soil Fertility Laboratory Manual (Classic Reprint)", "The Story of the Soil; from the Basis of Absolute Science and Real Life" and "Soil Bacteria and Phosphates (Classic Reprint)".

Books by Cyril G Hopkins

Soil Fertility La...
Hopkins, Cyril G.
Hardback: $25.59

Illinois Crop Yie...
Hopkins, Cyril G.
Paperback:

Soil Bacteria and...
Hopkins, Cyril G.
Hardback: $24.31

The Story of the ...
Hopkins, Cyril G.
Paperback: