If you're planning to use your land for both animal & veg production, you can do no worse than fall back on a traditional rotation system. Some years ago, living in Devon, I used the following rotation, which generally worked well. Divide your land into 4 areas. Year 1, Area A, Grass; Area B, Sheep; Area C, Veg; Area D, Turnips. Then Year 2, Area A, Sheep; Area B, Veg, etc
You move your sheep onto the Grass Area (Summer) then to the Turnip Area (Winter). Sheep muck helps your veggies grow. Turnips leave nitrogen in the soil, which helps the grass grow. We allowed sheep, ducks & chucks to wander (manure) together. Take advice (from a local farmer) on how many sheep to the area you have available. If too many sheep for the available grass/turnips, they will escape!
Hope this helps.........