Acsri c 



f 



THE SOIL 3 



AN INTRODUCTION TO THE SCIENTIFIC 

 STUDY OF THE GROWTH OF CROPS 





 BY SIR A. D. HALL, K.C.B., F.R.S. 



LATE DIRECTOR Or THE ROTHAM8TED STATION (LAWES AGRICUIi- 



TURAL TRUST); AND FOREIGN MEMBER OF THE ROYAL ACADEMY 



OF AGRICULTURE OF SWEDEN 



THIRD EDITION, REVISED AND ENLARGED 





NEW YORK 

 E. P. DUTTON AND COMPANY 

 1920 



