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

Beans - Chlorosis

Symptoms
Young leaves develop intercostal chlorosis. Leaves may then become bleached. Brown lesions develop on veins, lamina and petioles as deficiency continues.

Reasons
Iron deficiency (right) The availibility of Fe declines above pH 6.0 and may be restricted by excessive P. High pH soils saturated with moisture occuring with low temperatures can be the reason for transient Fe deficiency.

Beans - Chlorosis

Symptoms
Young leaves develop intercostal chlorosis. Leaves may then become bleached. Brown lesions develop on veins, lamina and petioles as deficiency continues.

Reasons
Iron deficiency The availibility of Fe declines above pH 6.0 and may be restricted by excessive P supply. High pH soils saturated with moisture occuring with low temperatures can be the reason for transient Fe deficiency.

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 crop development