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If you put Quality In you get Quantity Out

AN vs Urea Weather Warning

The effectiveness of Urea is severely impacted on by the weather- why take the risk?

 Chance of rainfall vs the decision to use Urea

 

Ammonium Nitrate (Nitram) or Urea?

  • Response to urea depends on air temperature and rainfall in the three days after application.
  • Response of grass growth to urea depends on the weather conditions in the 3 days after application.
  • The amount of rainfall and air temperature are critical factors.
  • Analysing the spring weather over 15 western GB sites from Cornwall to Glasgow and for 2011 – 2015 shows how unreliable urea can be
  • At 0 oC, urea needs 5mm rainfall in 3 days after application to work effectively – chance of getting enough rainfall is 1 in 3 (33%)
  • At 5 oC, urea needs 7mm rainfall in 3 days after application to work effectively – chance of getting enough rainfall is 1 in 4 (24%)
  • At 10 oC, urea needs 10mm rainfall in 3 days after application to work effectively – chance of getting enough rainfall is 1 in 7 (15%)
  • AN is the reliable, consistent, cost effective option for spring applied N on grassland
  • With Nitram product density at 1,000kg/m3 and urea density at 750kg/m3 , any spreader hopper will contain the same kgs Nitrogen whether it contains Nitram or urea.

 

Example from Cheshire for spring 2015

Cheshire weather data vs the use of urea

 

Ammonium Nitrate- reliable growth response, more suited to UK conditions.

 

Urea weather warning