fHIS BOOK is RtSPfiCTFULLY DEDICATEEI 

 TO 



SIR HORACE PLUNKETT 



THE FATHER OF THE IRISH AGRICULTURAL 



CO-OPERATIVE MOVEMENT 



AND THE FOREMOST AGRICULTURAL THINKER IN EUROPE 



TO WHOM THE AUTHOR IS DEEPLY GRATEFUL 



FOR HIS GENEROUS HELP 



AND THE GREAT FACILITIES WHICH HE PLACED AT 



THE AUTHOR'S DISPOSAL 



TOWARDS THE ELUCIDATION 



OF THE MANY PROBLEMS 

 OF CONTINUOUS CROPPING 



/ wish to place on record my stncerest thanks to my old 

 teacher^ Professor Crowlher^ of Leeds University^ for the 

 undertaking of several analyses, and the cheerful help he has 

 always extended to me in connexion with several investiga- 

 tions^ and also to the many agricultural experts and farmers 

 wJw have helped me with much valuable criticism and practical 

 suggestions, and last, but by no means least, to my wije, who 

 has practically written every word of the book from my dicta- 

 Hon, compiled most of the tables, and who, realising my difficulty 

 in doing the actual writing myself made a study of short- 

 hand and typewriting, with the sole object of making me into 

 ** a writer" I 



T. WIBBERLEY. 



■^rdOtt., 1916. 



QUkKN's UwiVEKSXTV, liKLKAST. 



4': 3824 



