/ 



\. 



'K 



^yn<kt ^'7 



r 



1 \m4''/ ^f^ 



'"' 'I'M 



a b c d e i 



Plate 9.— Salts of Copper on Wlieat. Season 1914. .02 per cent, of Copper in 



(lifTerent forms. 



(a) No treatment ; (ta) snlpliate ; (c) phospliate : (c1) carbonate ; (e) nitrate ; (f) arsenite. 



Pr\TE 10.— Salts of Copper on Wheat. Season 1914. .02 per cent, of Copper in 



different forms. 



Roots of plants in Plate 9. 



(a) No treatment; (b) s\ilphate . (c) phosphate; (d) carbonate; (e) nitrate. 



