THE FEEDING OF 

 CROPS AND STOCK 



AN INTRODUCTION TO THE 



SCIENCE OF THE NUTRITION OF 



PLANTS AND ANIMALS 



BY A. D. HALL, M.A., F.R.S. 



DIRKCTOR OF THE ROTHAMSTED EXPERIMENTAL STATION 

 FOREIGN MEMBER OF THE ROYAL ACADEMY OF AGRI- 

 CULTURE OF SWEDEN 



WITH ILLUSTRATIONS AND DIAGRAMS 



NEW YORK 

 E. P. DUTTON AND COMPANY 



1911 



