Øystein S. wrote:hazelnuts would [produce], the wild variety is all over the place, and I have cultivated varieties on the wish list in any case. When I get around to it.... But I think the nuts would be more for human than animal consumption?
Self-feeding would be even better, of course. But the trouble with that is that the ground is often too wet from October till May, so too much cow trampling would damage the field and turf to much.
If the wild variety isn't commonly used for human food, or can be grown more abundantly than there is a market for, perhaps planting hedges of it along your farm roads would work. Cows might, then, be able to self-harvest and only trample the road.
Or if you sell some nuts for human consumption (maybe grind them and blend with cacao to swirl into the ice cream...), presumably some fraction of your production wouldn't be fit for sale, and could be retained as feed.
Another option, since it is so wet there: you might dig some earthworks for drainage and retention of water, and grow duckweed in them. Some varieties can withstand low temperatures if part of the system has deep water, and dried duckweed is apparently very good animal feed.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.