spinrut is pronounced swede
Beets are not all beetroot. Rape (plant) is from the Latin for turnip and Canada renamed the rape seed oil (produced since ancient times) to Canola. All brassicas.
I don't know if I've ever seen a manglewurzel, (a kind of beet). We used to feed our goats with some residue from beets (sugar was produced from sugar-beet). That's all gone now so as to not disadvantage sugar cane growers with an unfair subsidy. Napoleon offered a reward for improving the sugar extraction.
The goats only ate grass if nothing else (like next doors roses) was left.