SN-341 
Zinc-deficiency symptoms on Red Mexican (U.I. 34) field beans. The yellowing and 
deformity shown by the three old leaves at the left appear in milder form in the 
younger leaf at the center. At-the right, a normal leaf. (Iron deficiency, also, 
produces yellowing between the veins of Red Mexican field bean leaves, but it 
affects the new leaves worse than the old and does not deform the leaves.) 
SN-342 
Sidearms of this hop branch show effects of zinc deficiency in their greatly 
shortened internodes and greatly reduced leaf size. The yellowing between veins 
of leaves on the branch is another effect of this deficiency. 
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