Nitrogen deficiency 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
- Improved crop development
 - Increased yield
 
Yara recommended fertilizers for Nitrogen
YaraVita® LAST N™ 25-0-0
Canola: 5 to 20 l/ha (2 - 8 l/acre) at the 4 to 8 leaf stage. Also, 5 to 20 l/ha (2 8 l/acre)at the onset of stem extension. Repeat 10 to 14 days later if necessary. Water rate: 50 to 200 l/ha (20 - 80 l/acre). Use sufficient carrier to adequately cover crop foliage.
Read more about YaraVita® LAST N™ 25-0-0