Yup we grow many varieties and mixtures for the dairy herd.
We deal with quality seeds. Here are the pasture mixes.
Pasture Forage Mixes | Quality Seeds
The alfalfa is dependent on the soil. We can usually get 4 cuts a year, depending on weather. This summer was dry so not very good yields.
We let the field grow three years then plow down for crop rotation.
Horse owners in this area dont like the alfalfa content. Go 800 kms north to the in-laws and they can't get snough alfalfa in their hay. So it is very dependent on the areas and the colder climates.
If your planting a pasture, get in touch with the local seed dealers to get a recommendation for your weather and soil. Its easy as going for a drive and finding the signs advertising the company. Every area is different.
There are some that are a bit drought resistant and some that need lots of moisture. I can't even guess for what i see texas as. (Dry and sandy)
I HATE reed canarygrass and would never suggest using it for cows.