G'day all,

Have been looking to bump our pastures along a bit so, for starters, does anyone want to comment on the case/s for or against using perenial & annual rye grass as part of a pasture seed mix?
Or is it the best shot to incorporate both?
Are there any particular varieties to use or to avoid?
I've also been getting conflicting information re: their (perneial & annual) respective abilities to withstand various grazing rates, handle overtly wet and overtly dry weather etc.
Not just rye grass either by the way, any thoughts on pastures in general most welcome.