PREFACE 



IN the preparation of this book, the author has endeavored to 

 develop the fundamental principles of crop production, as demon- 

 strated by practical experience. In general the principles referred 

 to are supported by experimental evidence. No exhaustive analysis 

 of experimental evidence is attempted, but only sufficient to clearly 

 prove the principles. Involved and debatable problems are generally 

 avoided, as there is sufficient standard and accepted work for the 

 scope of this book. 



The text is intended for the use of students having some prac- 

 tical knowledge of crop production. It is hoped to meet the needs 

 of such students in agricultural short courses, and secondary schools, 

 and also a considerable class of beginners in agricultural colleges. 

 Being of a practical nature, the >book will also be found a handy book 

 for farmers desiring a reference book covering all of the cultivated 

 crops. 



E. G. MONTGOMERY. 

 CORNELL UNIVERSITY, Ithaca, N. Y., 

 December, 1915. 



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