MANVKK, VIl.I.D A.\!> snl.riH.K SALTS IN SOILS. 11 



FiG. 4. Corn on Norfolk Sandy Soil where 15 tons manure had been applied 

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



FIG. 5. Corn on Norfolk Sandy Soil to which nothing had been added. Corn 

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



