HRAK 1i\ its HiiLATION TO IRHICATION. 



T.t 



Plate IV. 



Photograph of a poition of tlie same meahe field at the junction of good and bad 

 growth. This photograph was taken 80 days from seeding and before the 

 mealies liad tasselled. The best plants were then 8 feet high, the worst less 

 then a foot and a half. Note how the ground is cracked open, showing that the 

 soil contains much clay. It is just the type easily deteriorated by excessive 

 water. 



Plafp. V 



The Effect of Brak. 



Photograph of a portion of the same field. Here a watercourse had been filled in 

 with material from a military manure dump. Th<4 mealies have OOt been able 

 to withstand the effect of the excess of nitrates in the soil, 



