Best non-chemical way to eradicate buttercups...

[Nakiska]

Hey all...as my title says...I need to get rid of a huge amount of buttercups. Approximately 70% of my horse pasture is buttercups! Last year, when we moved here, there were a couple patches...I was careful not to let them overgraze the field...and this year...oh my gosh! My entire pasture is yellow with them! Probably about 2 acres worth of buttercups.

I'd prefer non chemical use....however if that is my only option, I can keep horses off that field for as long as it takes.

If anyone has experience in this area...I'd sure like some advice.

Thanks!

Toni