Planting grass/alfalfa mix

So I've been kicking around the idea of planting a orchard/alfalfa mix next spring.   I've never actually planted a mix before.   I've planted grass in a thin stand of alfalfa, but never a mix from scratch.  I read a few old posts on here about seeding rates, but the few threads seemed to have different ideas.    I don't particularly like baling grass/alfalfa mixes.   Especially if you have more alfalfa in one part of the field and more grass in another part.   Makes for different length bales.   Then there is the proper moisture to bale.   To dry and there goes the alfalfa.  To moist and risk spoiling the grass.   But it seems people kinda want the stuff around here.   But then some what more alfalfa then grass in a bale and then some want more grass then alfalfa.   Silly horsey people.   They never know what they want.  

 

Anyways.  What seeding rates of orchard and alfalfa have you used?   I use a 15 foot Great Plains drill with 6 inch rows.   What variety of alfalfa?   Obviously not RR.   But the cheapest variety? or a hybrid?   

 

Also what do you do about weeds?   In this particular field there will be a weed problem thanks to a previous tenant's growing "organic" corn a few years ago.  He ended up with corn and lots of mature weeds.    With a mix you can't spray for either grasses or broadleaf.   Do you just clip it until the alfalfa and grass take over the first year?    I would expect the alfalfa to grow the best the first year.   

 

I'll probably end up just planting orchard/brome.   Or maybe straight alfalfa.  But wanted some ideas about planting a mix.  

Planting grass/alfalfa mix