Is this winter wheat and what made these scrapes?

[Fenelon]

Carbide studded track on snowmobile did that

[longpointer]

Farmers plant Rye as a Winter ground cover down here in Norfolk County so I would go with that to explain the "green stuff".
If that rock was on a well used trail then I would go with snowmobile track making scratches as I've seen regulated/marked snowmobile trails on many farms here in Norfolk County. You might be able to get a local trail map and see if it's on the same land ?