The poly twine I started using last year is green and from what I was told is biodegradable and will rott away after 2 yrs.
I agree RickB
Round balers sure have made for some lazy farmers these days.
We do both square and round, sisal twine for square and poly for round. We also store 95% of our hay indoors, so I guess the twine type doesn't really matter in that regard. I'm amazed that people would just dump a bale in the feeder with the twine on it, even if it is sisal. Sisal twine is coated with preservatives and I can't imagine that is good for cows, much less getting tangled in it, etc.
When I go to feed a bale, I pick it up, cut the strings off it right at the barn then haul it out to the field. With good tight bales almost no hay falls off when the strings are cut. If you happen to have a bale where the 'seam' is on the bottom, I just fold it back over the top. This way I don't tangle strings around my axles, don't have to get out in the mud (which we don't let happen anyways), and once in the field I can just set the bale down and put the bale ring over it. No messing with strings while the cows are pushing at the bale.
if it wasn't for that orange twine, half my horse tack would't stay on and half my gates wouldn't have hinges.. :) :) ;)
orange bailing wire.. :)