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

Tobacco - Growth retardation

Symptoms
Mn deficiency results in growth reduction. Medium leaves often show mosaic-like interveinal chloroses.

Reasons
Manganese deficiency (right plant). Can be easily confused with Fe deficiency.

Manganese deficiency made worse by

  • Organic soils
  • Sandy soils
  • High pH
  • Cold wet periods
  • Fluffy soils

Manganese is important for

  • Nitrate reduction
  • Photosynthesis
  • Protein synthesis
  • Maintains strong growth and development