Diagnosis of Copper Injury 205 



Sample „ Yellow barley plants 



No. 



6343 Roots, crinkly and angular, much branched near surface. 



Dry weight, 3.2429 gms; Cu, .00085 gm; p.p.m 262 



6344 Soil shaken from yellow barley roots 



Copper 07979% 



Total soluble solids (alkali) 46400 



CI as NaCl OO'i 



Sodium carbonate 008 



Nitrogen ^^^ 



T). Green barley plants from near (a). 



6345 Roots, smooth and straight, not much branched near sur- 



face. Dry weight, 1.6025 gm ; Cu, .0002 gm; p.p.m 125 



6346 Soil shaken from green barley roots 



Copper 05844% 



Total soluble solids (alkali) 45600 



CI as NaCl 00^ 



Sodium carbonate none 



Nitrogen 1^^ 



lot 2. — Young barley plants from the upper end of a field in West 

 Layton under Montezuma Canal. Soil near ditch known to contain tail- 

 ings and showing spots of yellow barley at head of field. 



Sample a. Yellow barley plants 



No. 



6347 Roots, crinkly and angular, much branched. 



Dry weight, 3.2977 gms; Cu, .0014 gm; p.p.m 425 



6348 Soil shaken from roots of yellow barley plants 



Copper 1113% 



Total soluble solids (alkali) 50 



CI as NaCl -008 



Sodium carbonate 008 



Nitrogen '"'^ 



h. Green barley plants from near (a) 



6349 Roots, smooth, straight, not much branched. 



Dry weight, 2.2473 gms; Cu, .0003 gm; p.p.m 133 



6350 Soil shaken from roots of green barley plants 



Copper 02678% 



Total soluble solids (alkali) : 40 



CI as NaCl 008 



Sodium carbonate 004 



Nitrogen 1^^ 



