I've been planting mixed species annual forages since visiting Gabe Brown's farm five years ago. I started with high diversity mixes (10-15 species) and have winnowed down to the varieties i've had the most success with. Here in south GA, in the summer I use Pearl Millet, sunn hemp, cowpea, and crabgrass. Used BMR sorghum sudan until the sugarcane aphids wiped me out. For fall/winter grazing, Oats and T-raptor hybrid brassica (turnip/rape), and for winter/early spring, I use Ryegrass,oats, triticale, t-raptor, crimson clover, hairy vetch and arrowleaf clover. Back when the winters were harder, I used more cereal rye than oats, but I haven't had an issue with winterkill down here, and the oats grow well early and I can get a little better ADG. I've given up on winterpea. Ryegrass is amazing, til early summer when it won't go away. I only get my grazing worth out of the legumes if I stockpile them into early spring. They grow like crazy late, but I don't get the multiple grazings like i would out of the Oat/T-raptor mix. Grazed that 4 times one fall/spring. The key to the brassicas is timed grazing. If you turn those cows loose on a field of brassicas, they turn loose. ADG's hit the cellar. We usually drill everything around 1/2" with good moisture.