LIST OF PLATES. 



PORTRAIT OF J. B. J. DIEUDONNE" BOUSSINGAULT (1802- 



1887) Frontispiece 



TO FACE PAGE 

 FIG. 9. INFLUENCE OF MEDIUM ON ROOT DEVELOPMENT OF 



LUPINES - 53 



FIG. ii. SWEDES FROM AGDELL FIELD, BROADBALK : UN- 

 MANURED; SUPERPHOSPHATES AND POTASSIC FERTILISERS; 

 AND COMPLETE FERTILISER - 65 



FIG. 30A. POOR GRASS PASTURE, UNTREATED PLOT, ^ 



HORNDON-ON-THE-HILL, ESSEX (LONDON CLAY) - between 



FIG. 306. ADJOINING PLOT, BUT TREATED WITH |3 I2 &3 I 3 

 GAFSA PHOSPHATE, FEB. 27, 1918 



