Nutrients

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

Soybean - Chlorosis

Symptoms
Iron deficiency symptoms on soybean are interveinal chlorosis of the upper, new leaves. With progressing deficiency, the complete leaf including the veins turns yellow to white. Brown or whitish necrotic spots may occur near the leaf edge.

Reasons
Iron deficiency. Soybean cultivars differ in their tolerance of Fe deficiency. Fe and Mn deficiency symptoms are difficult if not impossible to tell apart.

Soybean - Chlorosis

Symptoms
Beginning interveinal chlorosis of the upper, new leaves due to iron deficiency.

Reasons
Iron deficiency. Soybean cultivars differ in their tolerance of Fe deficiency. Fe and Mn deficiency symptoms are difficult if not impossible to tell apart.

Soybean - Chlorosis

Symptoms
Beginning interveinal chlorosis of the upper, new leaves due to iron deficiency. Chlorosis starts on the leaf base and proceeds along the midrib.

Reasons
Iron deficiency. Soybean cultivars differ in their tolerance of Fe deficiency. Fe and Mn deficiency symptoms are difficult if not impossible to tell apart.

Iron deficiency made worse by

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

Iron is important for

  • Increased formation of chlorophyll
  • More efficient photosynthesis
  • Better formulation of proteins

Yara recommended fertilizers for Iron

YaraVita® FERRICHEL NINETY™

YaraVita® FERRICHEL NINETY™

Soybeans: 1 to 3 lbs/acre from 2 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. Do not apply during flowering. Water rate: 20 gallons/acre

Read more about YaraVita® FERRICHEL NINETY™