Makers of Modern Agriculture

MAKERS OF MODERN AGRICULTURE
MACMILLAN AND CO., Limited
LONDON · BOMBAY · CALCUTTA · MELBOURNE
THE MACMILLAN COMPANY
NEW YORK · BOSTON · CHICAGO · DALLAS · SAN FRANCISCO
THE MACMILLAN CO. OF CANADA, Ltd.
TORONTO

Jethro Tull Founder of the Principles of Dry-Farming. 1674-1740.
MAKERS OF MODERN AGRICULTURE
WILLIAM MACDONALD, D.Sc.