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

Soya bean - Necrosis

Symptoms
Ca deficient plants show reduced leaf expansion, primary leaves are often cup-shaped when emerged. Brown spots on young leaves and premature leaf senescence occur.

Reasons
Calcium deficiency Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soya bean - Deformation

Symptoms
Ca deficient plants show reduced leaf expansion, primary leaves are often cup-shaped when emerged. Brown spots on young leaves and premature leaf senescence occur.

Reasons
Calcium deficiency Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soya bean - Necrosis

Symptoms
Small brown spots, coalescing to interveinal necrosis on young leaves, and premature leaf senescence occur due to calcium deficiency.

Reasons
Calcium deficiency Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soya bean - Chlorosis

Symptoms
Interveinal chlorosis on younger leaves due to calcium deficiency.

Reasons
Calcium deficiency Calcium deficiency is most common in acid, sandy soils low in organic matter.

Soya bean - Necrosis

Symptoms
Striking leaf symptoms due to Ca deficiency: drop-like, whitish to bluish spots occur on the leaf blade. Necroses of the same color expand along the leaf margin.

Reasons
Calcium deficiency Calcium deficiency is most common in acid, sandy soils low in organic matter.

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

  • Improved cell division and elongation
  • Proper working of cell membrane
  • Permeability of cell membrane