MANURE, HELD A.XD SOLUBLE SALTS I \ SOILS. 13 



FIG. 8. Corn on Norfolk Sand where 13 tons of manure had been applied per 

 acre. Corn was planted and photographed on same dates as for Fig. 2. 



FIG. 9. Corn on Norfolk Sand to which nothing had been added. Corn was 

 planted and photographed on same dates as for Fig. 2. 



