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Nutrient Deficiency Diagnosis in Corn (Zea mays L.)
Mian Sajid Hussain
Plant Nutrition
+92-333-8382939
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Nitrogen Deficiency
Nitrogen deficiency causes pale, yellowish-green corn plants with spindly stalks. Symptoms appear on leaves as a v-shaped yellowing, starting at the tip and progressing down the midrib toward the leaf base.
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Phosphorus deficiency in corn
Phosphorus deficient plant showing purple discoloration on leaves advancing along the leaf margins . Deficiency is usually visible on young corn plants.
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Potassium deficiency in cornPotassium deficient corn plants exhibit chlorosis along the leaf margins and tips of the older leaves. This spreads from the tip to the base then turns to necrosis. In severe cases, the leaves appear dry and scorched along the edges and tips. Potassium deficient leaf showing marginal chlorosis and necrosis starting from the leaf tip
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Boron deficiency in cornsymptoms showing in young leaves in corn. Deficiency is favored by drought; sandy soils that are low in organic matter; and high soil pH.
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Copper deficiency in corn
The youngest leaves are yellow as they come out of the whorl, and the tips may die. The stalk is soft and limp.
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Iron deficiency in corn
Deficiency symptoms first appear on younger leaves while older leaves remain normal (Left). As Fe deficiency persists, prominent green veins fade and become light green to pale yellow
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Zinc deficiency in corn.Zinc deficient corn compared with Zinc sufficient corn (Left). White to yellow bands begin at the base of the leaf. The midrib and leaf margins remain green. Close-up of leaf showing the symptomatic white band
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Manganese deficient corn plant
Pale green young leaves with pale yellow interveinal
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Magnesium deficiency in corn.
Lower leaves showing reddening or browning of leaf tips and margins
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Calcium deficiency in corn
Youngest leaves remain rolled and joined together at their tips
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Sulfur deficiency in corn
Pale green upper leaves and darker lower leaves
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Nutrient Deficiency Diagnosis in Potato (Solanum tuberosum L.)
A Basic Lecture
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Nitrogen Deficiency
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Phosphorus Deficiency
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Potassium Deficiency
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Sulfur Deficiency
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Iron Deficiency
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Magnesium Deficiency
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Manganese Deficiency
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Copper Toxicity in Potato
THANKS Source: Iowa State & Idaho University of Extension