Dear friends,
My head is turning around from so many aspects and arguments :confused2:
But I agree with the one - most important thing is to use the tires what they are designed for.
I've bought an M tractor with the 12.4 X 24 front and 18.4 X 30 rear Ag TITAN tires. They are worn out up to ~1 inch of lugs remaining. I'm about to think whether to change the tires or not. If yes, what type or what kind of manufacturer to choose? The type of ground I have is clay, sand, soil and some sandstone.
Important argument posted by 'montejw' who says "ag tires would be better for some of this, but the yard (where the tractor is stored) would be trashed." Curious thing is, that a small L tractor (~900 kg) with deep lugs damages my grass in the yard much more than a heavy M machine (~3000 kg) with shallow lugs. But indeed, all must depend on the works you're gonna do.
And I really like TITAN tire producer (its distribution is not available in my country): if even the tires are old (2003) and after heavy use, but there are no tear or crack traces because of time and ultraviolet rays impact on them. I can buy the Ag or industrial tires of required dimensions over here, but I doubt about their quality. The 12.4 X 24 are of Israeli production and 18.4 X 30 are Russian.
Anyway, it's not a problem. We'll see...
And one extra question just for fun

Wouldn't you think, that the worn out Ag tires with shallow lugs may perfectly function as the industrial ones?