DRY-FARMING: 



ITS PRINCIPLES AND PRACTICE 



BY 



WILLIAM MACDONALD 



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

 FBLLOW OF THE 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 



fUustrate& 



UKW AND REVISED EDITIOH 



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NEW YORK 



THE CENTURY CO. 



1911 



