CONTENTS. 



Page. 



Introduction 7 



Natural factors of plant growth in the Great Plains fixed 8 



Economic conditions in the Great Plains changed 9 



Extent of the semiarid region 10 



Climate 11 



Precipitation , 11 



Evaporation 13 



Winds 15 



Effect of wind on agriculture 16 



Light 17 



Irrigation water 17 



Soils... 18 



History of the settlement of the region 20 



Conditions that have brought about resettlement 21 



Farm practices in the region 22 



The agricultural future of the region 24 



Future prices of products 25 



Improved methods of tillage 25 



Introduction and development of drought-resistant crops 31 



Promising systems of farm management 34 



Opportunity for farmers in the Great Plains 39 



Index 41 



215 5 



