Copper on spring barley

[Laggard]

Going to give the 2-3 leaf spring barley 2litres/ha manganese, is it worth putting 0.25litre/ha copper in or is it too soon?

 

[deleted user 837354]

Going to give the 2-3 leaf spring barley 2litres/ha manganese, is it worth putting 0.25litre/ha copper in or is it too soon?

If you suffer from it, I would put it in obviously the crop is only small at the moment, so reduce the rate down.

Make sure it is repeated again mind.

 

[Laggard]

If you suffer from it, I would put it in obviously the crop is only small at the moment, so reduce the rate down.

Make sure it is repeated again mind.

How low can I go?

 

[deleted user 837354]

How low can I go?

That very much depends on the product you are using mind. The label rate will tell you the maximum dose. What dose do you use normally? What is full rate? You can ring the technical helpline and ask them- that is what they are for.

You see I don't know your manganese product, the one I tended to use had a reasonable dose at 1L/ha. Obviously cost will be a factor as well.

 

[Brisel]

Have you had copper deficiency before? I used to do it with the T1 in spring barley on chalk soils. It showed up low in most leaf tissue tests.

 

[Laggard]

Have you had copper deficiency before? I used to do it with the T1 in spring barley on chalk soils. It showed up low in most leaf tissue tests.

Have only used it at T1 before, for deficiency and to help reduce ergot. Just thought if I’m going through with Mn would it be worth a bit of Cu?

 

[Laggard]

That very much depends on the product you are using mind. The label rate will tell you the maximum dose. What dose do you use normally? What is full rate? You can ring the technical helpline and ask them- that is what they are for.

You see I don't know your manganese product, the one I tended to use had a reasonable dose at 1L/ha. Obviously cost will be a factor as well.

Copper oxychloride 435g/l @ 0.25l/ha usually @ T1

 

[Laggard]

0.25l/ha Cu costs £1.33/ha.

 

[robbie]

I go twice on cereals, 0.25 both times normally in the autumn on well tillered crops and again at T0 or T1. For spring barley I usually chuck it in like your thinking of doing and again at T1.
Tissue analysis shows up low copper and zinc.

 

[deleted user 837354]

I go twice on cereals, 0.25 both times normally in the autumn on well tillered crops and again at T0 or T1. For spring barley I usually chuck it in like your thinking of doing and again at T1.
Tissue analysis shows up low copper and zinc.

From memory, Yara have a combined copper, Mn and zinc product.

 

[cricketandcrops]

Mancozin @ 1.0 lt/ha = 330g Mn, 110g Cu and 84g Zn

 

[robbie]

With an ibc of MN it's cheaper to buy Yara copper and zinc and add as required

 

[e3120]

Potential daft question, but is the copper in blue stone in a useful state? On paper looks loads more cu for the money at ~£2/kg.

 

[Laggard]

With an ibc of MN it's cheaper to buy Yara copper and zinc and add as required

How much Zn do you put in Robbie?

 

[robbie]

0.25lt/ha twice.