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Turnip

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The turnip, scientifically known as Brassica rapa subsp. rapa, is a versatile root vegetable. It is grown in temperate climates all over the world. People cultivate small, tender varieties for human consumption. Larger varieties are often grown to serve as feed for livestock.

Hakurei turnips (49856034022)
Hakurei turnips (49856034022)

The name "turnip" can sometimes refer to the rutabaga, which is a related but different vegetable. This plant is a member of a large family that includes mustards and radishes. It is valued for both its fleshy root and its nutritious green leaves.

The physical structure of the turnip is quite unique. The most common type has white skin on the lower portion. The upper part of the root protrudes above the ground. This exposed shoulder often turns purple, red, or greenish due to sunlight. This colorful section develops from stem tissue but remains fused with the root. The interior flesh is entirely white. The root is roughly globular and lacks side roots. Underneath the swollen storage root, a thin taproot extends downward. This taproot is often trimmed off before the vegetable is sold.

Hakurei turnips (49856034022)
Hakurei turnips (49856034022)

Turnips are biennial plants, meaning they follow a two-year life cycle. During the first year, the plant focuses on growing a large root to store nutrients. In the second year, the plant uses those nutrients to flower and produce seeds. The flowers are tall and bright yellow. These flowers produce seeds in small, pea-like pods.

Wright, Stephenson & Co Ltd - Turnip crop in flower (52480)
Wright, Stephenson & Co Ltd - Turnip crop in flower (52480)

To collect seeds, farmers may pull the turnips and store them over the winter. In the spring, the plants can be set back into the ground to complete their lifecycle.

Cultivating turnips requires careful timing and temperature control. They grow best in cool weather. If temperatures become too hot, the roots can become woody and develop a bad taste. In cold-weather climates like Canada, they are typically planted in the spring. In these areas, the growing season lasts only 3 to 4 months. In temperate regions with 5 to 6 month seasons, farmers may plant a second crop in late summer. In warmer climates, they are planted in the fall. The average time from planting to harvest is 55 to 60 days. Recent studies suggest that agrivoltaic shielding, which uses partially-transparent solar panels, can help mitigate heat stress and increase yields.

The history of the turnip stretches back thousands of years. Wild relatives of the turnip grew across Europe and western Asia. Genetic studies show that the most diverse varieties are found in Central Asia. This suggests that edible turnips were first domesticated there several thousand years ago. The vegetable later spread to Europe and East Asia. Farmers in these regions began selecting for larger leaves. The turnip became an important food in the Hellenistic and Roman worlds. It eventually reached China and Japan by 700 CE.

Wright, Stephenson & Co Ltd - Turnip crop in flower (52480)
Wright, Stephenson & Co Ltd - Turnip crop in flower (52480)

In the Antebellum United States, the turnip was a vital staple. It was especially useful for new plantations that were not yet fully productive. The greens could be harvested just a few weeks after planting. In the southern United States, people often boiled turnip greens with salt pork. The resulting broth was called "pot likker." This broth was traditionally served with crumbled corn pone.

Hakurei turnips (49856034022)
Hakurei turnips (49856034022)

Turnips also hold a place in specialized culinary traditions. In the Austrian region of Wildschönau, farmers make a schnaps called Krautinger. This spirit is made from a variation of Brassica rapa subsp. rapa. It is known for having a very distinct smell and taste.

The nutritional profile of the turnip is quite impressive. Boiled turnip greens are a powerful source of vitamins. They provide more than 20% of the Daily Value (DV) for vitamin K, which is 350% DV. They also provide significant amounts of vitamin A, vitamin C, and folate. These greens contain 8440 micrograms of lutein per 100 grams. The boiled root itself is about 94% water. It provides a moderate amount of vitamin C, which is 14% DV. Both the roots and the leaves contain very little fat, making them a light food source.

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File:Hakurei turnips (49856034022).jpg
Hakurei turnips (49856034022).jpg
File:Wright, Stephenson & Co Ltd - Turnip crop in flower (52480).jpg
Wright, Stephenson & Co Ltd - Turnip crop...
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