PREFACE vii 



of Missouri (Orchards) ; Dr. W. L. Howard, Professor of Pomol- 

 ogy, University of California (Plant Propagation) ; C. A. Scott, 

 Professor of Forestry, Kansas State Agricultural College (For- 

 estry) ; L. E. Call, Professor of Agronomy, Kansas State Agri- 

 cultural College (Dry Farming) ; Dr. W. W. Garner, Physiologist 

 in charge of Tobacco and Plant Nutrition Investigations, United 

 States Department of Agriculture (Tobacco) ; George A. Dean, 

 Professor of Entomology, Kansas State Agricultural College 

 (Insect Pests) ; E. C. Johnson, State Leader, Kansas State Ag- 

 ricultural College (Plant Diseases) ; Albert Dickens, Professor 

 of Horticulture, Kansas State Agricultural College (Spraying) ; 

 J. M. Evvard, Live Stock Experimentalist, Iowa State College 

 (Feeding Animals); E. A. Trowbridge, Professor of Animal 

 Husbandry, University of Missouri (Horses and Mules); O. E. 

 Reed, Professor of Dairy Husbandry, Kansas State Agricultural 

 College (Dairy Cattle and Dairy Manufactures) ; H. P. Rusk, Beef 

 Cattle Specialist, University of Illinois (Beef Cattle); T. H. 

 Wright, Assistant Professor of Animal Husbandry, Kansas State 

 Agricultural College (Swine and Sheep) ; W. A. Lippincott, Pro- 

 fessor of Poultry Husbandry, Kansas State Agricultural College 

 (Poultry) ; A. A. Potter, Dean of the Division of Engineering, 

 Kansas State Agricultural College (Mechanical Power for the 

 Farm) ; D. H. Doane, Professor of Farm Management, Univer- 

 sity of Missouri (Farm Management) ; and O. R. Johnson, As- 

 sistant Professor of Farm Management, University of Missouri 

 (Farm Accounts). 



For valuable suggestions regarding the adaptations of the 

 principal crops to the particular regions with which the follow- 

 ing men are most closely associated, acknowledgment is made 

 to : Dr. Andrew M. Soule, President of the State College of 

 Georgia ; Dr. B. W. Killgore, Director of the North Carolina 

 Department of Agriculture ; Andrew Boss, Chief of the Division 

 of Agronomy and Farm Management, University of Minnesota ; 

 J. F. Duggar, Director of the Agricultural Experiment Sta- 

 tion of Alabama ; F. W. Taylor, Professor of Agronomy of the 

 New Hampshire Agricultural College ; Dr. C. B. Hutchison, 



