Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulfur
B Boron
Cu Copper
Fe Iron
Mn Manganese
Zn Zinc

Corn - Growth retardation

Symptoms
Plant shows stunted growth. At severe deficiency necrotic zones develop at leaf margins and tips.

Reasons
Severe iron deficiency (left)

Corn - Chlorosis

Symptoms
Symptoms of iron deficiency start on younger leaves. Plants show chlorotic leaves with interveinal stripes. When the deficiency becomes severe the veins also become chlorotic and plant growth is stunted.

Reasons
Iron deficiency. Can be confused with manganese deficiency, but manganese deficiency is very rare in corn. Magnesium deficient plants also show interveinal chlorosis, but the symptoms start on older leaves.

Iron deficiency vs. healthy plant made worse by

  • High pH
  • Water logged soils
  • Calcareous soils
  • High copper, manganese or zinc soils

Iron is important for

  • Healthy green foliage
  • Improved yield and grain quality

Yara recommended fertilizers for Iron

YaraVita® FERRICHEL NINETY™

YaraVita® FERRICHEL NINETY™

Corn: 1-3 lbs/acre from two weeks after emergence, or as soon as there is sufficient leaf cover to intercept the spray. Repeat as necessary at 10 to 14 day intervals. Note: Final application to be made at least one month before harvest. Water rate: 20 gallons per acre.

Read more about YaraVita® FERRICHEL NINETY™