The Fertility of the Soil 



BEING THE 



SEVENTEENTH ROBERT BOYLE LECTURE 



DELIVERED BEFORE 



THE OXFORD UNIVERSITY JUNIOR SCIENTIFIC CLUB 

 On the jrd of June, 1910 



BY 



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



DIRECTOR OF THE ROTHAMSTED AGRICULTURAL 

 EXPERIMENTAL STATION 



LONDON : HENRY FROWDE, AMEN CORNER, E.G. 

 EDINBURGH : 12 FREDERICK STREET. GLASGOW : 104 WEST GEORGE STREET 



OXFORD: 116 HIGH STREET 



NEW YORK : 29-35 WEST 32ND STREET 



TORONTO: 25-27 RICHMOND STREET WEST 



MELBOURNE: CATHEDRAL BUILDINGS, 205 FLINDERS LANE 



1911 



