What’s causing this?

[Jerry]

Not sure if photo shows but there’s a definite line where grass changes. In left yellowish compared to right hand side.

No difference as far as soil type is concerned and line does not follow the direction usual of work in this field.

Grass on left just does not look healthy.

GS4 mix that was cut for hay. No Fert applied.

 

[ritchiekirkland]

Old field boundary ?

 

[serf]

Residues from spray on previous crop / muck applied / not applied on other half /Quality of muck used different from one to other

 

[Jerry]

Old field boundary ?

No old boundary that I’m aware of and that is looking at maps as far back as the 1700’s

 

[Jerry]

Residues from spray on previous crop / muck applied / not applied on other half /Quality of muck used different from one to other

If it was those causes the change would not follow that line as I never work that field along the axis of the change which is whats making me scratch my head.

 

[thorpe]

Not sure if photo shows but there’s a definite line where grass changes. In left yellowish compared to right hand side.

No difference as far as soil type is concerned and line does not follow the direction usual of work in this field.

Grass on left just does not look healthy.

GS4 mix that was cut for hay. No Fert applied.

weather wet or dry the weather can throw up many historic anomolies in fields

 

[sticky]

Are there any more legumes on the right feeding the grass more?

 

[ladycrofter]

Or parasite plants on the left? Crawl around and look also at the roots. If the pattern is roughly circular it's likely biological. Weevils etc.

I had yellow rattle one year in one field, never seen it in 15+ years then bang it's there. Then gone the next.

 

[primmiemoo]

Highly disciplined leatherjackets?

 

[Luke Cropwalker]

I would start with the basics and get someone to pH test both sides of that line.

 

[tinsheet]

Shallow soil on a rock shelf ?