50 pounds per acre of seed is a pretty thick stand. That will give you a a good fine stemmed hay.(for haygrazer) If your after hay. Fertilize it pretty heavy. Around here 150 pounds of nitrogen per cutting is about the normal. If you want head high grass with big wide leaves. That's what you need. In my observations. I've tried 75 pounds and got knee high. Haygrazer needs nitrogen. If you don't fertilize after cutting don't expect to get another one. You can graze the regrowth. Just be careful. You can graze it safely as long as you do your due diligence. Around here probably managed Haygrazer can yield 3 to 4 cuttings. And you should do a soil test. P and k are important to. And you really need to incorporate them in during the discing part of preparing the field.