DRY-FARMING 



ITS PRINCIPLES AND PRACTICE 



By WILLIAM MACDONALD 

 M.S.Agr., Sc.D., Ph.D. 



Second and Revised Edition 



This is the first book yet published on a subject of 

 vital importance to many thousands of people. There 

 are many millions of acres of arid land where the soil 

 is fertile though the rainfall is low, that potentially are 

 areas of great productivity. The amount of moisture 

 which a soil can hold depends chiefly upon the depth 

 of the soil reservoir and the fineness of the soil par- 

 ticles. That is to say, deep ploughing and the thorough 

 pulverising of the soil are the two factors which enable 

 any soil to hold the maximum amount of moisture. 

 The book discusses : 



History of Dry- Farming 



Some Points in Practice 



The Conservation of Soil Moisture 



Rainfall and Evaporation 



The Problem of Tillage 



The Campbell System 



Dry-Farming Zones 



Dry-Land Crops 



The Traction-Engine in Dry-Farming 



Dry-Land Experiments 



Dr Macdonald is a man of broad training and ex- 

 perience, and his story is a fascinating as well as an 

 instructive one. This, too, is a book for the general 

 reader as well as for all interested in the study and 

 practice of agriculture. 



32 Full-fage Illustrations. 300 Pages 



6*. net, Postage Sd. 



WERNER LAURIE LTD. 

 Clifford's Inn, London 



