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nitrogen application

Discussion in 'Cropping' started by Hfd Cattle, Feb 4, 2019.

  1. Brisel

    Brisel Member

    Location:
    Dorset
    The bulk densities and granule sizes are different. You'll have to spread them separately unless you can blend them properly and have a pneumatic spreader.
     
  2. Brisel

    Brisel Member

    Location:
    Dorset
    Remember, nitrogen doesn't make a plant grow. It helps it grow when conditions are right.
     
  3. Chae1

    Chae1 Member

    Location:
    Aberdeenshire
    Its called super start, only available in Ireland. 40% can 60% urea.

    Id use it here for first application.
     
  4. clemmo

    clemmo Member

    Have they stopped making it?
    Apparently it’s a hard process to get right
     
  5. Chae1

    Chae1 Member

    Location:
    Aberdeenshire
    I saw advert for it in irish farm journal, so must be on market this year.
     
  6. clemmo

    clemmo Member

    It was being sold here too but I was told it had been pulled
     
  7. Jez Agronomist

    Jez Agronomist New Member

    Location:
    Kirriemuir
    This season Super Start is only available in Ireland.

    It is made from a blend of calcium nitrate and urea but is not straightforward to produce. Last season as a trial some was also available the UK, ex Avonmouth but it gave the production guys lots of headaches, not sure why but something to do with the bagging plant or facilities that wasn’t easy to fix. So not available this season.
     
    Chae1 and cricketandcrops like this.
  8. Brisel

    Brisel Member

    Location:
    Dorset
    @Fromebridge Roughly how long does it take for urea fertiliser to become available to the crop at this time of year please? I'm reading lots of posters who think it's weeks but I think it's quicker than that even when soil temperatures are under 5 degrees.
     
  9. Fromebridge

    Fromebridge Member

    Location:
    Glos
    I think it's more like 'days', but could be up to a week if really cold. In warm soils (when it really shouldn't be applied) it can happen in hours.

    Edit: assumes it's 'in ' the soil, of course, and not lying on dust above.
     
    Last edited: Feb 11, 2019
    robbie and Brisel like this.
  10. Jez Agronomist

    Jez Agronomist New Member

    Location:
    Kirriemuir
    Conversion from urea to nitrate is a two step process, first from urea to ammonium and then from ammonium to nitrate. Both are temperature dependent Currently soils are still at 2°C, half of where it would normally be. At this temperature the first transformation of urea to ammonium will take around 4 days, whist the second transformation from ammonium to nitrate could be over 6 weeks.
     
  11. Brisel

    Brisel Member

    Location:
    Dorset
    Plants can use ammonium, can they not?
     
    robbie likes this.
  12. Fromebridge

    Fromebridge Member

    Location:
    Glos
    Yes.
     
  13. Jez Agronomist

    Jez Agronomist New Member

    Location:
    Kirriemuir
    Plants can use both Nitrate and Ammonium but prefer to take up and use Nitrate. Nitrate can be used straight away but the plant has to first convert Ammonium into Nitrate to use it. This can take some time and has a slight cost to the plant. There is also a slight cost to the plant to take up Ammonium as this has to be done actively whereas Nitrate is taken up passively in the transpiration stream
     
  14. average farmer

    Location:
    North Notts
    2nd wheats given urea about 10 days ago looked a lot nicer shade of green yesterday.
     
    Fromebridge and Cropper like this.
  15. robbie

    robbie Member

    Location:
    the brecks norfolk
    Done my rape today and then started on the winter barley.
    I was very surprised to see green buds visible in the centre of the plants it seems very early. 20190213_155732.jpg
     
  16. An Gof

    An Gof Member

    Location:
    Cornwall
    Similar here, rape all done and half way through barley. Going to crack on and do the wheat and oats as well.
     
    robbie likes this.
  17. Headless chicken

    Location:
    West Wales
    How many units are people putting onto winter wheat for the first round? I’m a WW virgin so unsure. Weather playing ball nicely so hoping to get out tomorrow with something
     
  18. silverfox

    silverfox Member

    Your brave doing oats this early.
     
    Hfd Cattle and newhollandcruzr like this.
  19. Brisel

    Brisel Member

    Location:
    Dorset
    40 kg/ha N
     
  20. Clive

    Clive Staff Member

    Location:
    Lichfield
    Started N1 on OSR today - will all be done by the weekend
     
    Andy12345 likes this.

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