DRY-FARMING: 



ITS PRINCIPLES AND PRACTICE 



BY 



WILLIAM MACDONALD 



M.S.AGR., SC.D., PH.D., D.SC., * 

 FELLOW OF THK ROYAL SOCIETY OF 



EDINBURGH AND THE GEOLOGICAL SOCIETY OF LONDON, 

 GOVERNMENT DRY-LAND AGRONOMIST, UNION DEPARTMENT OF 

 AGRICULTURE, SOUTH AFRICA, AND CORRESPONDING 

 SECRETARY FOR THE INTERNATIONAL DRY- 

 FARMING CONGRESS 



flllustratefc 



NEW AND REVISED EDITION 



NEW YORK 



THE CENTURY CO. 



1911 



