Nutrients

K Potassium
Mg Magnesium
Ca Calcium

Mango - Necrosis

Symptoms
Symptoms start on older leaves, the margins become grayish necrotic, and the leaves die off later. Chlorosis does not occur.

Reasons
Potassium deficiency on the leaves

Potassium deficiency made worse by

  • Acidic soils (low pH)
  • Sandy or light soils (leaching)
  • Drought conditions
  • High rainfall (leaching)
  • or heavy irrigation
  • Heavy clay (illite) soils
  • Soils with low K reserves
  • Magnesium rich soils

Potassium is important for

  • Healthy green foliage
  • Important for fruit size, development and yield
  • Reduction of fungal diseases