This little book is intended as an introduction to the subject; the other may be classed as technical, but nevertheless can be understood by any one who gives it serious thought.  This book tells the true story of the soil, for which the other gives a thousand proofs.

Grateful acknowledgment is here expressed that even the measure of success thus far attained on Poorland Farm has been possible largely through the co-operation of a beloved brother, Carl Edwin, the man who does a world of work, ably assisted by “Adelaide.”