Nutrients

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

Corn - Growth retardation

Symptoms
Yellow or white streaky spots may develop on leaves with brown waxy raised streaks as deficiency continues. Growth is stunted with shortened internodes

Reasons
Boron deficiency (right)

Boron deficiency vs. healthy plant made worse by

  • Sandy soils
  • Alkaline soils
  • Soils low in organic matter
  • High levels of nitrogen
  • High levels of calcium
  • Cold wet weather
  • Periods of drought

Boron is important for

  • Improved cob and kernel development
  • Improved crop development
  • Increased yield