Nitrogen deficiency vs. optimum made worse by

  • Low or high pH soils
  • Sandy or light soils (leaching)
  • Low organic matter
  • Drought conditions
  • High rainfall (leaching) or heavy irrigation
  • Addition or high levels of non-decomposed organic matter/manure (eg straw)
  • Fast growing crops

Nitrogen is important for

  • Healthy foliage
  • Optimum photosynthesis
  • Improves yield and quality