Nutrients

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

Tobacco - Deformation

Symptoms
Ca deficiency symptoms first appear on youngest leaves. They become light green, and tips and margins become necrotic. Furthermore, the leaves are bent downwards like claws, the growing point dies off. The older leaves remain dark green.

Reasons
Calcium deficiency Several nutrient deficiencies such as sulphur and iron start with chlorosis on younger leaves, but the claw-like shape of the leaves is characteristic for Ca deficiency.

Tobacco - Deformation

Symptoms
Ca deficiency symptoms first appear on youngest leaves. They become light green. Furthermore, the leaves are bent downwards like claws, the growing point dies off. The older leaves become darker green.

Reasons
Calcium deficiency Several nutrient deficiencies such as sulphur and iron start with chlorosis on younger leaves, but the claw-like shape of the leaves is characteristic for Ca deficiency.

Tobacco - Deformation

Symptoms
Ca deficiency symptoms first appear on youngest leaves. They become light green. Furthermore, the leaves are bent downwards like claws, the growing point dies off. The older leaves become darker green.

Reasons
Calcium deficiency Several nutrient deficiencies such as sulphur and iron start with chlorosis on younger leaves, but the claw-like shape of the leaves is characteristic for Ca deficiency.

Tobacco - Deformation

Symptoms
Ca deficiency symptoms first appear on youngest leaves. The leaves are bent downwards like claws, the growing point dies off. The older leaves remain dark green.

Reasons
Calcium deficiency The claw-like shape of the leaves is characteristic for Ca deficiency.

Calcium deficiency made worse by

  • Acidic soils
  • Sandy or light soils (leaching)
  • Acid peat soils
  • Soils rich in sodium
  • Soils rich in aluminium
  • Drought conditions
  • Fruit high in nitrogen or potassium
  • Large fruit

Calcium is important for

  • Structure, stability and permeability of cell membranes
  • Regulation of enzyme systems
  • Alongside potassium responsible for regulation of stomata
  • Gives plants more resistance to biotic and abiotic stress
  • Improves leaf quality
  • Required in large quantities