PLATE 1. — Zinc Phosphate, Zinc Nitrate, and Zinc Cai’bonate on Wheat. Season 1,31b. 
(a) No treatment ; (5) '03 per cent. Zinc as phosphate ; (c) '03 per cent. Zinc as nitrate ; 
(d) '03 per cent. Zinc as carbonate. 
d 
PLATE 2 -Zinc Phosphate, Zinc Nitrate, and Zinc Carbonate on Wheat. Season 1913. 
Roots of plants in Plate 1. 
(a) No treatment ; (6) '03 per cent. Zinc as phosphate ; (c) '03 per cent. Zinc as mtrate : 
’ (d) -Q3 per cent. Zinc as carbonate. 
