CONTENTS. 5 



Bulletin No. 175.— The History and Distribution of Sorghum — Con- 

 tinued. Page. 

 Summary 4S 



Agricultural history and distribution 48 



Botanical history and classification 49 



Bibliography 51 



Index 55 



Bulletin No. 17<;. — Seeds and Plants Imported during the Period from 

 July 1 to September 30, 1909 : Inventory No. 20 ; Nos. 25718 to 26047. 



Introductory statement 7 



Inventory 9 



Publication of new names 31 



Index of common and scientific names 33 



Bulletin No. 177. — A Protected Stock Range in Arizona. 



Introduction 7 



Early history of the inclosed area ± 7 



History of the area since 1903 8 



Surface covering 9 



Conditions inside and outside of the fenced area 10 



Natural reseeding 11 



Artificial reseeding 12 



Temporary changes in vegetation 14 



Permanent changes in vegetation 15 



Peculiarities of the feed 17 



Weeds 17 



Yield of vegetation 19 



Carrying capacity 21 



Increase of shrubs 21 



Summary 24 



Index 25 



Bulletin No. 178. — Improvement of the Wheat Crop in California. 



Introduction 7 



Common methods of cultivation unsatisfactory 8 



Original methods of cultivation 8 



Changes from original methods 8 



Bad results of past and present methods 9 



Soil low in humus and nitrates 9 



Soil foul with weeds 10 



Requirements for the production of profitable crops 10 



Smaller farms and personal supervision by owners 10 



Improved methods 11 



Deep plowing 11 



Addition of humus and nitrogen to the soil 12 



Crops to be used as green manure 13 



Time and method of handling 13 



Effect of deep plowing and green manuring 15 



Increased yields 15 



Increased profits 17 



Cleaning the laud of weeds 18 



Development of better varieties of wheat 1 19 



Variety tests in California 19 



Selecting varieties for California 20 



Climate and soil 20 



