Preventing liquid fert scorch.

[samsung]

I know most of the unconverted will say best way to prevent scorch is to stop using it !
Can I add anything to the tank to reduce scorch ?
Hypro jets, reasonable pressure and weather.
Only real negative AS and Urea home mix.
All replies will be taken .
Thanks S

 

[nonemouse]

Been using Lechler FD nozzles on your old sprayer since I bought it, only time I've had any noticeable scorch has been when I've tried putting too much on through small nozzles and ended up at over 4 bar pressure

 

[PSQ]

We ‘home brew’ our own UAS which is about 23.7% N, so it shouldn’t be as ‘hot’ as some of the other higher % brews. But then again the pH will be pretty low as the AS is quite acidic, it neutralises a kilo of lime for every kilo of AS iirc which is a bit frightening.
Wind damage is the worst we see with it, with the wax rubbing away and the tips burning off, looks bad, but I always tell myself it’s cosmetic.

 

[B'o'B]

I would say the Hypro nozzles aren’t the best for reducing scorch. I got some at a farm sale that filled in some gaps in the sizes I had as Hardi Quintastreams and I do think the Hypro’s are a bit more prone to scorching even at 1.5bar.
Some say adding molasses can help but I’ve never tried it, but I think @Clive does all his fert with it.

 

[Shutesy]

My first year with liquid fert, only put the 1st pass of liquid on this week so waiting to see if I have scorched anything. Using Hardi Quintastreams for 200l/ha of 24N 7.5 SO3 @ 1.5-1.8bar (think pressure is the most important factor, nothing above 2 bar ideally!) keeping booms between 50-80cm as best I can, trying to avoid spraying after windy conditions though have done a bit this morning as a test and not applying to soon after a frost. We are applying a mollasses based product @5l/ha from ED&F Man which has shown some reduced scorch in trials work I saw a magazine article about. Hoping all the above should prevent me scorching anything. Did put some on in the small amount of rain we had earlier in the week which should be ideal hopefully!

 

[Brisel]

To scorch the crop you need these conditions;

• Wind
• Hot sun
• Rapid lush growth
• A wet leaf that dries after application
• High pressure >3bar
• Multiple streams
• A recent hot mix of sprays that might dewax the leaves. May include oils or other surfactants
• High boom heights that allow the streams to break up into dropletsd
• Recent winds that have rubbed fleaves together
• Contains ammonium nitrate

This isn’t an exhaustive list.

 

[Wigeon]

no matter how hard I try I always end up scorching something. Just when I think 'haven't I done well this year' I nail it with the final application. Yara swear that there's no yield penalty, but still spending a fortune keeping leaves green only to burn them off is a bit depressing.

Agroco Umbrella jets sub 2 bar ideally for me, and not after/ during a wind.

As a side note I once put some through a flat fan on some rape at flowering. Small area, and can't quite remember now why I did it. Anyway, not a single leaf survived. Not one! Plants made it through somehow though.

 

[Heathland]

You need a set of these,

Guess what,




I've got a set for sale,hardly done any work,
Enough for a 36m sprayer.

 

[Shutesy]

You need a set of these,

Guess what,




I've got a set for sale,hardly done any work,
Enough for a 36m sprayer.

Are you moving away from liquid fert then?

 

[Andrew K]

My first year with liquid fert, only put the 1st pass of liquid on this week so waiting to see if I have scorched anything. Using Hardi Quintastreams for 200l/ha of 24N 7.5 SO3 @ 1.5-1.8bar (think pressure is the most important factor, nothing above 2 bar ideally!) keeping booms between 50-80cm as best I can, trying to avoid spraying after windy conditions though have done a bit this morning as a test and not applying to soon after a frost. We are applying a mollasses based product @5l/ha from ED&F Man which has shown some reduced scorch in trials work I saw a magazine article about. Hoping all the above should prevent me scorching anything. Did put some on in the small amount of rain we had earlier in the week which should be ideal hopefully!

Rain is Ok provided it washes the N off the leaf, drizzle can make things worse! Rape is normally the easiest to scorch, but its only cosmetic IMO.

 

[Heathland]

Are you moving away from liquid fert then?

I have.

 

[Breakthru]

Try adding in Sulphur as in Kumulus or similar. Puts a coating on the leaves if you use 1- 2 kg/ha.
Mixing it in may be your problem

 

[B'o'B]

Another thing I have noticed is that hungry plants scorch easier than lush ones

 

[deleted user 837354]

Another thing I have noticed is that hungry plants scorch easier than lush ones

Softer cuticle perhaps??

 

[B'o'B]

Softer cuticle perhaps??

Less waxed? I’m unsure. Just something I noticed a couple of times when I got a bit late.

 

[jonnyjon]

Yara and the chemical industry in general, claim that and bit of yellowing / scorch is just cosmetic, personally I don't believe and word of it, all stresses have a yield penalty imo

 

[fred.950]

Yara and the chemical industry in general, claim that and bit of yellowing / scorch is just cosmetic, personally I don't belief and word of it, all stresses have a yield penalty imo

Rightly or wrongly we tolerate a certain amount of scorch on early applications in the belief timeliness would outweigh any yield penalty. I’m probably wrong.

 

[Jack Russell]

I’ve scorched my rape this year worse than I have ever managed before. I’m currently telling myself it’s a method of manipulating the GAI. It’s growing that fast that it’s disappearing rapidly. Wheat I get a bit more jittery about and make sure final application is on before the flag emerges. Never seen any real issue of yield loss through scorch though.

 

[samsung]

Thanks for all your replies.
Wind and wax sound my biggest problems.
I used to use Albuz nozzles with 3 streams . Which gave less scorch but were very height sensitive and could leave stripes in dry conditions.
They worked better with high biomass, which helped spread the product.
So thats why I went to the hypro type with 6 outlets .
Molasses sounds interesting.

 

[Jon]

Forgive the intrusion, I am keen to go to liquid, to allow me to confidently apply product to the edge of the field, and not in the hedge, but this thread does not fill me with confidence.
Sounds like everything is against it, nozzles, boom height, weather conditions, any 'good' experiences ?