Foliar N

[Swedeboy]

Would it be possible to use only foliar in order to make the most of expensive nitrogen? As I understand it is way more efficient but is it possible supply all this way? Looking to apply 170 kg N/ha.
Thanks

 

[neilo]

Would it be possible to use only foliar in order to make the most of expensive nitrogen? As I understand it is way more efficient but is it possible supply all this way? Looking to apply 170 kg N/ha.
Thanks

It would be difficult to apply foliar N before you have sufficient foliage to take it up. You would need granular (or liquid of course) N to get the plants to that stage.

 

[Swedeboy]

At what stage would it be sensible to start with foliar, do you think?

 

[Andrew K]

I think you might have scorch troubles unless you spray only in dull/dark conditions, and are not too ambitious regarding rates . What type of liquid n are we talking about?

 

[cricketandcrops]

Would it be possible to use only foliar in order to make the most of expensive nitrogen? As I understand it is way more efficient but is it possible supply all this way? Looking to apply 170 kg N/ha.
Thanks

Nope, IMO Still need a decent amount of soil applied N to build the biomass, if can apply 120-160 kg N then you use the foliar N to replace the final 30-40 kg N.

 

[ollie989898]

I'd sooner dump the lot in the growing crop than pish about trying to feed a crop solely through foliar means.

 

[Swedeboy]

My idea would be to give 50 kg injected and then come back with 15 kg foliar per pass hoping not having to go to 170 if foliar proves more efficient..

 

[Swedeboy]

and all n20 urea

 

[cricketandcrops]

Have to be careful with straight N20 urea applied foliar through conventional nozzles as scorch risk very high!

 

[Gong Farmer]

Have to be careful with straight N20 urea applied foliar through conventional nozzles as scorch risk very high!

Good grief yes, been there etc.

Presumably N20 that misses foliage and hits the soil isn't wasted. With true foliar products you'd need a full canopy to intercept it which may not happen until April-ish.

 

[cricketandcrops]

Good grief yes, been there etc.

Presumably N20 that misses foliage and hits the soil isn't wasted. With true foliar products you'd need a full canopy to intercept it which may not happen until April-ish.

agree entirely........I know a few who have historically made their own N20 for soil applied applications through dribble bars so can be applied to soil, however I wouldn't want to be applying to the leaf regularly through flat fan nozzles!

I like you believe the true foliar products (eg Safe-N) need a full canopy eg apply T2/T3, so IMO cannot replacement soil applied N completely, need the full crop foundation then these supplement the final N dose which with the exception of milling wheat is normally the more marginal application in terms of ROI.

 

[Swedeboy]

Could you give me some pointers on safe-N? Sweden is the land of granular fertilizer so limited knowledge…

 

[cricketandcrops]

Safe-N is a foliar product, containing 30% N in various forms https://www.yara.co.uk/crop-nutrition/fertiliser/micronutrient/yaravita-safe-n-300/ the product applied late can help supplement base applications. The product however is not currently available in Sweden

 

[Swedeboy]

Thanks!
Anyone using something else also safe?