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 AGRICULTURAL EXPERIMENT STATION
New York
THE MACMILLAN COMPANY
LONDON: MACMILLAN & CO., Ltd.
1921
Copyright, 1906,
By THE MACMILLAN COMPANY.
Set up and electrotyped. Published July, 1906.
Norwood Press: Berwick & Smith Co.,
Norwood, Mass., U.S.A.
SUMMARY OF CHAPTERS.