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 students taking a general agricultural course. Being of a prac- 

 tical nature, the book will also be found a handy book for farmers 

 desiring a- reference book covering all agricultural crops. 



E. G. MONTGOMERY. 

 CORNELL UNIVERSITY, Ithaca, N. Y., 

 December, 1915. 



