Hi Stephen,
Goats don't dig, so tubers won't help, except their leaves. Animals can wear paths, so proper rotations for adequate regrowth will help eliminate erosion, along with seeds and mulch. Your best bet for rotational grazing will be mob grazing small paddocks rotated daily. That means training the sheep and goats to electric netting like Premier 1 sheep and goat netting, that can be easily moved daily, then setting them up with 24 hours worth of forage. That will get you the best pasture usage, if you mix species graze goats and hair sheep.
Depending on the moisture, temperature and humidity will determine how long till the paracite larvea hatch, and how long they can live. So about 5 to 6 weeks before grazing again with the same paracite susceptible species, depending on seasonal conditions. If you break the paracite cycle by haying or fully grazing with a none susceptible species, that doesn't share paracites, then the management is just about AUMs and forage management for optimizing the ballence of animal and pasture health. If your pastures are adequately recovered in 3 weeks during certian times of the year, you could mob graze some cows or
chickens, to keep that pasture in its nutritional peak, for the next round through with goats. Forages can loose nutritional quality like protien content if the forage get to mature, which can sometimes happen during 6 weeks of regrowth. Grasses heading up, or forages going into bloom are signals your protien content and digestible fiber are dropping quickly. So sometimes mowing becomes necessary if grazing with none paricite susceptible species isn't an option.
You have to keep a keen eye on your feilds, know all your forages nutritional value, and know what it takes to balance everything for all around optimal health, while keeping things low maintenance.
You said Angora goats? Regardless, animals bread for very spacific qualities typically loose other qualities like hardiness and paracite resistance. So proper rotations may be critical to avoid developing paricites resistant to dewormers, as some breeds are highly susceptible to paricite problems.
Have you considered a few
beef cows or a large laying flock of
chickens to use as dead end paricite traps, in rotational grazing, to help complement rotations with your goats? Otherwise you may have to mow.
Well for a cool weather mix, landino white clover or any of the hybrids like Patriot clover, is a good perennial to have in your mix, but not over 40%. Birdsfoot Trifoil, Common Vetch, Hairy Vetch, Biennial Sweet Clover, Annual Sweet Clover, Crimson Clover, Berseem Clover are all good annual legumes to have nutrient wise. Alfalfa and Sainfoin are good perennials to have nutrition wise if you don't get to much rain for the alfalfa. The Sainfoin is important to have if it will grow in your stand to reduce bloat from the other legume forages. Berseem is non bloating, and a good annual to have. Frosty Berseem is a frost tolerant multicut cultivar. The low tannin legumes will cause bloat if you don't balance your mix right. Goats aren't as susceptible to bloat as cows, but they can still get bloat. So slowly transitioning feeds is important. You can keep your perennial rye grass for a cool growing grass, but it may be smart to augment it with other cool growing grasses known for good nutritional content, like Timothy grass, Orchard grass, or which ever types of quality perennial grasses do well in your conditions. That way as you move through the cool season, each grass will have its time to shine.
For a warm season mix I would just recommend broat cast seeding annuals like Sunn Hemp, Sorghum-Sudangrass, cow peas, Forage Sunflower, Millet and what ever good forage crops will do well in your warm season. The annuals will drastically improve your soil health and organic matter with no till practices. If they graze through and destroy the warm season crop, just broadcast seed again to grow a new one. 6 weeks of growth with warm season annual can create alot of forage. Many farmers seed and in 30 days graze it. You could even broadcast before you mob graze, letting the animals firm your seed bed.
So if your not happy with your deer mix, which belive it or not, goats will like, they just wont evenly graze. Check out the forage suggestion I made to see if they will work in your area.
Hope that helps.