Swede

A swede holds in a clamp or a cool store through winter with its flesh and flavour intact, and a turnip does not. That single difference decides which of the two a livestock system plants: a crop that keeps is winter feed that can be rationed, and a crop that does not is feed that has to be used when it is ready.

Fertilizer rates, timing, and forms should follow local soil tests and regional guidance. AgricultureID does not publish universal fertilizer recommendations.

Brassica napus arose from a cross between B. rapa and B. oleracea with both chromosome sets retained, and it carries both the oilseed and this root crop. The corpus publishes oilseed rape as the species page and swede as the root form, because a page about a crop grown for seed cannot carry a crop grown for a root.

Swede is B. napus and turnip is B. rapa; swede is denser, yellow-fleshed, longer-season and keeps, and turnip is fast and does not. In Scotland "neep" means swede, in England it often means turnip, and North American usage says rutabaga. A record naming either has to be resolved to a species.

Soil suitability should be assessed with local soil survey information and, where available, field testing.

Sown in late spring and lifted in autumn, swede occupies ground for most of a growing season, which is the cost of its keeping quality. That makes it a planned crop rather than a catch crop, and it competes for land in a way that stubble turnips do not.

Clubroot resting spores persist for many years and swede is fully susceptible, so it competes for rotational space with oilseed rape, brassica vegetables and turnip. In an arable rotation that already carries rape, adding swede shortens the interval between brassicas, and the interval is the control.

Management combines resistant varieties, rotation, monitoring, and — where justified — locally authorized control products applied according to their labels.

Powdery mildew and dark leaf spot reduce the canopy and therefore the root, and because the crop is in the field for months the exposure is long. Cultivar resistance and interval between brassicas do more than anything applied late.

A large share of the crop is livestock feed, lifted or grazed, and the rest is a vegetable with a strong regional identity — a fixture of Scottish and Nordic winter cooking. Production statistics that count only the vegetable trade understate the crop substantially.

Swedes for the fresh market are commonly waxed to slow moisture loss, which is a handling step turnip does not get because turnip is not held long enough to need it. The wax is a shelf-life decision and it changes how the root is displayed and sold.

The crop tolerates frost in the field and its flavour is commonly held to improve after one, so lifting can be delayed into cold weather. What limits it is season length at the start rather than cold at the end, which is the reverse of most root crops.