nitrogen application

Brisel

Member

Arable Farmer

Location

Midlands

• Feb 10, 2019

• #21

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.

 

Brisel

Member

Arable Farmer

Location

Midlands

• Feb 10, 2019

• #22

Remember, nitrogen doesn't make a plant grow. It helps it grow when conditions are right.

 

Chae1

Member

Location

Aberdeenshire

• Feb 10, 2019

• #23

robbie said:

That's interesting, I've been debating to go with AN or urea ?
I like the AN for quick availability but urea is less likely to leach and in my opinion matches the crop needs better. My thinking is if it's cold the plant won't need it and the urea won't get converted but as the soil warms the plant grows and the rate of conversion of the urea increases.

I've only got a small area osr which imo needs its N first.so I did wonder about going over it twice with 1/2 cwt of AN and 1/2 cwt urea. I'm not sure how it would spread if I could mix it.

Click to expand...

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

Id use it here for first application.

 

C

clemmo

Member

• Feb 10, 2019

• #24

Chae1 said:

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

Id use it here for first application.

Click to expand...

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

 

Chae1

Member

Location

Aberdeenshire

• Feb 10, 2019

• #25

clemmo said:

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

Click to expand...

I saw advert for it in irish farm journal, so must be on market this year.

 

C

clemmo

Member

• Feb 10, 2019

• #26

It was being sold here too but I was told it had been pulled

 

Jez Agronomist

Member

BASIS

Location

Kirriemuir

• Feb 10, 2019

• #27

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.

 

Brisel

Member

Arable Farmer

Location

Midlands

• Feb 11, 2019

• #28

@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.

 

Gong Farmer

Member

BASIS

Location

S E Glos

• Feb 11, 2019

• #29

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

Jez Agronomist

Member

BASIS

Location

Kirriemuir

• Feb 11, 2019

• #30

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.

 

Brisel

Member

Arable Farmer

Location

Midlands

• Feb 11, 2019

• #31

Plants can use ammonium, can they not?

 

Gong Farmer

Member

BASIS

Location

S E Glos

• Feb 11, 2019

• #32

Brisel said:

Plants can use ammonium, can they not?

Click to expand...

Yes.

 

Jez Agronomist

Member

BASIS

Location

Kirriemuir

• Feb 11, 2019

• #33

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

 

average farmer

Member

Location

North Notts

• Feb 11, 2019

• #34

2nd wheats given urea about 10 days ago looked a lot nicer shade of green yesterday.

 

robbie

Member

BASIS

Location

the brecks norfolk

• Feb 13, 2019

• #35

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.

 

An Gof

Member

Location

Cornwall

• Feb 13, 2019

• #36

Similar here, rape all done and half way through barley. Going to crack on and do the wheat and oats as well.

 

Headless chicken

Member

Location

West Wales

• Feb 13, 2019

• #37

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

 

D

DRC

Member

• Feb 13, 2019

• #38

An Gof said:

Similar here, rape all done and half way through barley. Going to crack on and do the wheat and oats as well.

Click to expand...

Your brave doing oats this early.

 

Brisel

Member

Arable Farmer

Location

Midlands

• Feb 13, 2019

• #39

Headless chicken said:

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

Click to expand...

40 kg/ha N

 

Clive

Staff Member

Arable Farmer

Location

Lichfield

• Feb 13, 2019

• #40

Started N1 on OSR today - will all be done by the weekend