CONTENTS 
PREFACE a A . ‘ ‘ ‘ a . ’ 
List or ILLusrrations F . . . . . 
CHAPTER I 
Inrropuction — Dry-rarminc Derinep 
Dry- vs. Humid-farming ‘ * : . 
The Problems of Dry-farming é . . . 
CHAPTER II 
Tur THEorRETICAL Basis or Dry-FARMING 
Water required for One Pound of Dry Matter 
Crop-producing Power of Rainfall 
CHAPTER III 
Dry-rarm AREAS — RAINFALL 
Arid, Semiarid, and Sub-humid 
- 1-10 
. 6 
22-34 
24 
Precipitation of the Dry-farm Pema of the United States 25 
Area of the Dry-farm Territory of the United States 
Dry-farm Area of the World . . . . 
CHAPTER IV 
Dry-FarM AREAS— GENERAL CLIMATIC FEATURES 
Seasonal Distribution of patntett 3 
Snowfall : 3 ‘ . F . < 
xi 
26 
32 
