Presumably you are talking about the front furrow that you throw up when you straddle four and where the wheel runs eventually for the finish.If you have ploughed the furrow shallower that underlies it on the previous run and then cover it with a slightly fuller furrow that should support the wheel better. I plough with 10" back tyres and the wheeling does not completely overlay this furrow, so throwing up a really big one will leave a thin high strip and will loose marks.. Everything in moderation but start your shallowing in good time.
Shallow off in good time on bothe sides or the finish will be way too deep. Your neighbours side then needs to become progressively shallower to mean the one above the sole furrow which becomes the show furrow is ploughed about 3” deep, slightly more if you need to make a furrow.right arcobob thankyou that explains it a bit more clearly, shallowing off rom the 8th furrow down can be easily forgotten when ploughing but it is important some competitors I know only shallow off only on there neighbours side is that common I don't know ?,is it best for the furrow under the wheel to be wider by opening up the disc ,so if your ploughing 10 .5 or 11 wide with 11 0r 12 inch tyres to put that at about 14 inches ? under the wheel ,and then obviously remember to put the disc back to normal setting afterwards.
I find a slightly narrower furr where the wheel will be running supports the wheel better as the mouldboard packs it tighter as its closer to the previous furr! Shallowing off in good time is the most important thing though!is it best to but a wider furrow under the wheel at the finish or deeper or combination of both, I tend to struggle getting it right to hold that wheel up.
Thankyouthankyou everyone for some sound advice I think my downfall has been not shallowing off, did improve on that at my last match also I did experiment with putting the front disc out wider and it did make a difference, but I need to work at it to get it right . Dave , sarn match schedules were out a couple of weeks ago it is on april 27. grassland as usual .contact g chidley 01758770350.