Nutrient deficiency diagnosis in Corn and Potato

A basic lecture on nutrient deficiency symptoms in Maize and Potato

1. Nutrient Deficiency Diagnosis in Corn
(Zea mays L.)
MianSajidHussain
Plant Nutrition
[email protected]
[phone]

2. 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.

3. 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.

4. Potassium deficiency in corn
Potassium deficient corn plants exhibit chlorosisalong 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 chlorosisand necrosis starting from the leaf tip

5. Boron deficiency in corn
symptoms showing in young leaves in corn. Deficiency is favored by drought; sandy soils that are low in organic matter; and
high soil pH.

6. 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.

7. 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

8. 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

9. Manganese deficient corn plant
Pale green young leaves with pale yellow interveinal

10. Magnesium deficiency in corn.
Lower leaves showing reddening or browning of leaf tips and margins

11. Calcium deficiency in corn
Youngest leaves remain rolled and joined together at their tips

12. Sulfur deficiency in corn
Pale green upper leaves and darker lower leaves

13. Nutrient Deficiency Diagnosis in Potato
(SolanumtuberosumL.)
A Basic Lecture

14. Nitrogen Deficiency

15. Phosphorus Deficiency

16. Potassium Deficiency

17. Sulfur Deficiency

18. Iron Deficiency

19. Magnesium Deficiency

20. Manganese Deficiency

21. Copper Toxicity in Potato
THANKS
Source: Iowa State & Idaho University of Extension