A Guide to Nutrient Deficiencies

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Healthy: Leaves shine with a rich dark
green color when adequately fed.

Phosphate: Shortage marks leaves with
reddish-purple, particularly on young plants.

Potash: deficiency appears as a firing or
drying along the tips and edges of lowest leaves.

Nitrogen: hunger sign is yellowing that starts at
the tip and moves along middle of leaf.

Magnesium: deficiency causes whitish strips
along the veins and often a purplish color on the
undersides of the lower leaves.

Drought: causes the corn to have a grayish-green
color and the leaves roll up nearly to the size of
a pencil.

Disease: heminthospoium blight, starts in small
spots, gradually spreads across leaf.

Chemicals: may sometimes burn tips, edges of leaves
and at other contacts. Tissue dies, becomes whitecap.