SOILS 



THEIR FORMATION, PROPERTIES, COMPOSITION, AND RELATIONS TO 

 CLIMATE AND PLANT GROWTH IN THE HUMID AND ARID REGIONS 



By E. W. Hilgard, Ph.D., LL.D. 



Professor of Agriculture in the University of California, and Director of 

 the California Agriculture Experiment Station. 



Cloth, 8vo, 59^ pages, $4.00 net 



This work, originally designed as a text-book for the writer's University 

 classes in agriculture, has been considerably expanded in response to a wide- 

 spread demand for a book which should present the principles and practices 

 of agriculture, not only in connection with the humid regions as has mostly 

 been done in existing works, but equally so in respect to the arid regions. 

 The important and often critical differences between the soil conditions of 

 . the two regions and of the corresponding differences in practice are only 

 casually referred to in most existing works. This painful gap in agricultural 

 literature Dr. Hilgard fills upon the basis of a prolonged personal experience 

 both in the humid and arid regions of the United States. 



In order to adapt the volume to popular as well as professional readers the 

 text is printed in two different kinds of type. The larger contains the matter 

 which is essential to any intelligent student of the subject and which will be 

 found interesting by any farmer or man with a country place. In the smaller 

 type is contained the more strictly scientific and technical matter. 



" Dr. Hilgard, by reason of his special and long-continued attention to the 

 chemistry of soils, and his intimate acquaintance with the subject, was pecu- 

 liarly well fitted for the task to which he applied himself in the preparation 

 of the present work. It is concise and yet exhaustive. Every phase of the 

 topic is thoroughly treated. Soils are discussed with relation to their origin, 

 properties, and composition as well as to the climate and their adaptability to 

 various crops and plant growths; also with regard to irrigation and fertiliza- 

 tion. A vast amount of scientific knowledge has been compressed into the 

 book, set forth in lucid style so as to be readily understood by any intelligent 

 reader. Technical terms are as far as possible avoided and the volume is 

 thoroughly practical. No farmer or fruit grower can afford to be without the 

 information contained in Soils. And while the work is necessarily expensive, 

 it is well worth the price." The Evening Bee, Sacramento. 



PUBLISHED BY 



THE MACMILLAN COMPANY 



64-66 Fifth Avenue, New York 



