xvil CONTENTS 
CHAPTER XVI 
PAGE 
IRRIGATION AND DRry-FARMING . é a % e - 828-350 
The Scarcity of Water . . . . . . 2 . 831 
Available Surface Water 5 ‘ - s . . . 3833 
Available Subterranean Water . . zi . . . 838 
Pumping Water . 3 . . . 341 
Use of Small Quantities of Water i in Trrigation . . . 3844 
CHAPTER XVII 
Tue History oF DRrY-FARMING . , ‘ ri 0 - 851-381 
Origin of Modern Dry-farming in the United States . . 854 
Utah 
California 
The Columbia Basin 
Great Plains Area 
Uniformity of Methods 
H. W. Campbell . ‘ . - F ‘ . .. . 861 
The Experiment Stations ‘ : - - 865 
The United States Department of Agsoulbare : . . 872 
The Dry-farming Congress . é e - . . 3874 
Jethro Tull . : 3 . 3 c i 3 i . 3878 
CHAPTER XVIII 
Tue Present Status oF Dry-FARMING . . a - 882-398 
California . i . . . ° ‘ . 3882 
The Columbia River Basitt 3 ‘ x 5 , j . 3884 
The Great Basin . r . . F . 3886 
Colorado and Rio Grande River Basins : s . . 3888 
The Mountain States. : ‘ c 2 . ‘ . 3889 
The Great Plains Area . 3 s ‘ . ‘ . 3889 
Canada . . 3 : . . . . é id . 3891 
Mexico . e p . is é - 3 0 3 . 3891 
Brazil . i ‘ . F c $ . ‘ . 892 
Australia . 7 . . : . a ‘ : . 3893 
