Alleopathic effect on following spring barley crops after multi species cover crops containing oats ?

[Goldilocks]

Am aware of alleopathic effects of oats but hoped that using spring oats in our multi species cover crops would not cause too many issues with emergence of following spring barley crops ( compared with using 100 % oat cover crops for example ) Had only approx. 50% emergence with spring barley this year ( planted 400 seeds and ended up with 200-250 plants ) Not sure it was all caused by sheep poaching when grazing cover crops in the wet , suspect an element of alleopathy???? Spring beans all established fantastically direct drilled at same time after same cover crops.

 

[Flat 10]

Am aware of alleopathic effects of oats but hoped that using spring oats in our multi species cover crops would not cause too many issues with emergence of following spring barley crops ( compared with using 100 % oat cover crops for example ) Had only approx. 50% emergence with spring barley this year ( planted 400 seeds and ended up with 200-250 plants ) Not sure it was all caused by sheep poaching when grazing cover crops in the wet , suspect an element of alleopathy???? Spring beans all established fantastically direct drilled at same time after same cover crops.

That’s not ideal. Direct drilled? You might get better answers in that section.

 

[ajd132]

When did you kill the cover crop?

 

[Devil's advocate]

Does the allothery affect broad leaved weeds or just cereals?

 

[T Hectares]

Am aware of alleopathic effects of oats but hoped that using spring oats in our multi species cover crops would not cause too many issues with emergence of following spring barley crops ( compared with using 100 % oat cover crops for example ) Had only approx. 50% emergence with spring barley this year ( planted 400 seeds and ended up with 200-250 plants ) Not sure it was all caused by sheep poaching when grazing cover crops in the wet , suspect an element of alleopathy???? Spring beans all established fantastically direct drilled at same time after same cover crops.

Ive been growing 90% Oat 10% Phacelia covers before SB for 4 years, they've been grazed by sheep also, but last year in particular the poaching was terrible as the sheep were grazing over that horrible period in Feb with the big storms, that's why I always cultivate them shallow with the all-rounder before drilling and have had no issues with emergence compared to the non cover cropped areas

 

[Timbo1080]

Spring white straw crops are the worst/most difficult to follow IMO......I.e. Spring Oats and Spring Barley are hateful. However, i doubt the percentage of Spring oats in a cover will have posed such a serious effect.......Or did you go to town with Oat the seedrate? Suspect T Hectares & ajd132 lines of thought are more pertinent.

 

[Goldilocks]

When did you kill the cover crop?

Varied from 3 days to 3 weeks pre drill

 

[Goldilocks]

Ive been growing 90% Oat 10% Phacelia covers before SB for 4 years, they've been grazed by sheep also, but last year in particular the poaching was terrible as the sheep were grazing over that horrible period in Feb with the big storms, that's why I always cultivate them shallow with the all-rounder before drilling and have had no issues with emergence compared to the non cover cropped areas

Maybe it was the poaching damage, would explain why beans were better as deeper drilling with the dale would have hooked out the footprints better than when drilling the barley ??

 

[ajd132]

Varied from 3 days to 3 weeks pre drill

I had quite a few spring cereals after spring barley this year. On the odd bit that the barley volunteers didn’t get sprayed out and was drilled green there was 20% of the crop there.

 

[Lincsman]

I had quite a few spring cereals after spring barley this year. On the odd bit that the barley volunteers didn’t get sprayed out and was drilled green there was 20% of the crop there.

Some spring barley near me showed up combine trails where winter barley overwintered, it was dead and yellow when direct drilled though.

 

[Clive]

Am aware of alleopathic effects of oats but hoped that using spring oats in our multi species cover crops would not cause too many issues with emergence of following spring barley crops ( compared with using 100 % oat cover crops for example ) Had only approx. 50% emergence with spring barley this year ( planted 400 seeds and ended up with 200-250 plants ) Not sure it was all caused by sheep poaching when grazing cover crops in the wet , suspect an element of alleopathy???? Spring beans all established fantastically direct drilled at same time after same cover crops.

i used to be very anti oats in covers but have found as long as % is kept low they are not a problem for following crops

not sure I would include them ahead of spring barley if i grew if however

 

[Clive]

Maybe it was the poaching damage, would explain why beans were better as deeper drilling with the dale would have hooked out the footprints better than when drilling the barley ??

bigger seeds seem to suffer less - peas or beans after grass always better than a cereal

 

[SilliamWhale]

Spring barley doesn't really like a cover crop. It particularly doesn't like a cereal ahead of it.

Graze. Spray off first week march. Drill from 5th April is my experience.

Its not warm enough

 

[yellow belly]

Spray off early
aply n pre drilling
plant high seed rate when conditions are right mid April is fine
all no till heavy land drought risk low if n is in the soil early enough