Alfalfa orchard yeilds

Got a big customer recently that would be willing to pay top dollar for OG Alfalfa and I just happen to have a feild that has been rotated from alfalfa and is ready for the next round. However I have a few concerns.
I plan on planting 15# alfalfa and 8# orchard, in attempt to shoot for a 50/50 mix, however my experience with alfalfa/grass mix has been 50/50 first cutting, 75% alfalfa for 2nd, and mostly grass the third. Is this accurate?
Also I think that the yeild would be less throughout the year as compared to straight alfalfa, due to a weaker stand. So what is the typical yeild for OG alfalfa? And is it more profitable than a pure stand of Alfalfa?

Alfalfa orchard yeilds