PLATE 16 
A. —Two stalks of Reid Yellow Dent growing in the same hill. The stalk to 
the right showed large accumulations of aluminum and iron compounds in the 
nodal tissues, also a yellow-streaked, wilted, and dry condition of the leaves. The 
stalk died prematurely. The one to the left apparently was in normal condition. 
The growing conditions had been the same for both stalks. This capacity to absorb 
available metal salts more rapidly by some stalks than others seems to be an inherited 
tendency and becomes manifest when the plants grow in certain soils. 
B. —These ears were borne on shanks which broke over prematurely. The ears 
are starchy, and in this condition they become infected by various organisms, the 
most common of which are Fusarium moniliforme and Gibberella saubinetii. They 
are thus rendered unfit for use as seed. These troubles are most prevalent under 
conditions of low available phosphates in the soil, or when too late-maturing strains 
of com are planted. 
