mangel

It is smaller than the mangel wurzel, and more compact, and appears in its texture to be more like the Swedish turnip.

From The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. by P. L. Simmonds

Three-fourths of the fields were meadow or pasture, or in mangel or turnips. 

From A Walk from London to John O'Groat's by Elihu Burritt

"I'm afraid, my dear young lady, I know very little of agricultural matters; in fact I don't know the difference between a mangel and a wurzel."

From Punch, or the London Charivari, Vol. 147, August 5th, 1914 by Various

Ten pounds of mangel beets per 100 hens or 1 square inch of well-sprouted oats per bird will supply needed green food during the winter.

From A Living from the Land by William B. Duryee

There are big coarse members of the beet and cabbage families called the mangel wurzel and ruta baga.

From The Library of Work and Play: Gardening and Farming. by Ellen Eddy Shaw