Vegetable

• 1. Introduction

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  In 1893, the United States Supreme Court sat down to answer a question most people think they already know: is a tomato a fruit or a vegetable? In the case of Nix v. Hedden, the justices ruled unanimously that a tomato is a vegetable, and should be taxed as one under the Tariff of 1883 on imported produce. Yet in the same breath they admitted something stranger. Botanically speaking, the tomato is a fruit. That contradiction sits at the heart of a word almost everyone uses and almost no one can define cleanly. A vegetable is an edible part of a plant eaten as food. But which parts count, and which do not, has never been settled. Why did a court have to weigh in at all? How did wild plants foraged by hunter-gatherers become crops grown across the world? And why do nutritionists keep urging us to eat five or more portions a day? The answers run from ancient kitchens to cold-storage warehouses, and from natural plant toxins to a global trade that lets one country grow more than half the world's supply.

• 2. A Word That Resists Definition

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  The word vegetable was first recorded in English in the early 15th century, borrowed from Old French and originally applied to all plants. It traces back to Medieval Latin vegetabilis, meaning growing or flourishing, itself shifted from a Late Latin sense of being enlivening or quickening. For centuries it did not mean food at all. The narrower meaning of a plant grown for food was not established until the 18th century. In 1767, the word was used specifically to mean a plant cultivated for food, an edible herb or root. The slang shortening veggie did not appear until 1955. As an adjective, the word still carries the old broad sense in scientific contexts, describing anything related to plants whether edible or not, as in vegetable matter or vegetable kingdom. The trouble is that plants offer so many edible parts: roots, stems, leaves, flowers, fruits, and seeds. The broadest definition treats vegetable as any matter of plant origin. A more precise one calls it any plant part eaten as food that is not a fruit or seed, while still including mature fruits eaten as part of a main meal. Even that leaves loose ends. Edible mushrooms and edible seaweed are not parts of plants at all, yet they are often treated as vegetables anyway. Here the words fruit and vegetable collide, because a fruit in botany is the part that develops from the ovary of a flowering plant. By that rule, eggplants, bell peppers, and tomatoes are all fruits, which is exactly how an argument over produce ended up before the highest court in the land.

• 3. From Foraging To Furrows

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  Before agriculture, humans were hunter-gatherers who foraged for fruit, nuts, stems, leaves, corms, and tubers and hunted animals for food. Forest gardening in a tropical jungle clearing is thought to be the first example of farming, where useful plant species were encouraged to grow and undesirable ones removed. Plant breeding followed, as people selected strains with desirable traits like large fruit and vigorous growth. The first evidence for the domestication of grasses such as wheat and barley comes from the Fertile Crescent in the Middle East. It is likely that various peoples around the world began growing crops in the period 10,000 BC to 7,000 BC. Vegetables long divided the rich from the poor. The wealthy could afford a varied diet of meat, vegetables, and fruit, while for poor people meat was a luxury and meals were dull, built around a staple of rice, rye, barley, wheat, millet, or maize. The Aztecs in Central America lived on maize and grew tomatoes, avocados, beans, peppers, pumpkins, squashes, peanuts, and amaranth seeds to supplement their tortillas and porridge. In Peru, the Incas ate maize in the lowlands and potatoes at higher altitudes, adding quinoa seeds, peppers, tomatoes, and avocados. Ancient kitchens elsewhere told similar stories. In ancient China, rice was the staple in the south and wheat in the north, accompanied by yams, soybeans, broad beans, turnips, spring onions, and garlic. The ancient Egyptians ate bread often gritty with sand that wore away their teeth, alongside marrows, broad beans, lentils, onions, leeks, garlic, radishes, and lettuces. The Greeks leaned on bread with goat's cheese, olives, figs, and onions, garlic, cabbages, melons, and lentils. The Romans grew broad beans, peas, onions, and turnips, and ate the leaves of beets rather than their roots.

• 4. The World On A Plate

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  Cassava, a tuber from South America, reaches a world production of 277.8 million tonnes, while the potato from the same continent climbs to 368.1 million tonnes, the heaviest figure among common vegetables for 2018. These numbers reveal how far single plants have traveled. The cabbage family, Brassica oleracea, originated in Europe and now yields cabbage, Brussels sprouts, cauliflower, broccoli, kale, and kohlrabi, with a combined production of 69.4 million tonnes. Origins scatter across the map. The carrot, Daucus carota, came from Persia and reaches 40.0 million tonnes. Lettuce, Lactuca sativa, traces to Egypt. The onion, Allium cepa, and garlic, Allium sativum, both come from Asia, producing 102.2 and 28.5 million tonnes. The tomato, Solanum lycopersicum, originated in South America and reaches 182.2 million tonnes, while its relative the eggplant came from South and East Asia. Beans tell a layered story of geography. Phaseolus species from Central and South America give the green bean, runner bean, and Lima bean at 55.1 million tonnes, while the broad bean, Vicia faba, from the Mediterranean and Middle East yields a far smaller 4.9 million tonnes. The sweet potato, Ipomoea batatas, and yam, Dioscorea, anchor tropical and South American diets at 91.9 and 72.6 million tonnes. Each crop carries the print of where it was first tamed, even as it is now grown wherever the climate permits.

• 5. Nourishment And Its Hidden Risks

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  Five or more servings a day is the threshold where the numbers shift. Research shows that, compared with people who eat fewer than three servings of fruits and vegetables daily, those who eat more than five have about a twenty percent lower risk of developing coronary heart disease or stroke. Most vegetables are low in fat and calories but bulky and filling, supplying dietary fiber and essential vitamins, minerals, and trace elements, with the antioxidant vitamins A, C, and E especially important. Their benefits reach beyond the heart. Including vegetables in the diet is linked to a lower incidence of cancer, stroke, cardiovascular disease, and other chronic ailments. Crunchy, hard-to-chew foods like raw vegetables matter during youth, while the bones still grow, because chewing them helps the jaws develop fully. Without that work, the jaws stay too small, leaving too little room for teeth and causing crooked and impacted teeth. Yet the same plants carry their own chemical defenses. Vegetables often contain toxins and antinutrients that interfere with nutrient absorption, including alpha-solanine, alpha-chaconine, oxalic acid, tannins, cyanide and its precursors. These exist to ward off insects, predators, and fungi. Some beans contain phytohaemagglutinin, cassava roots contain a cyanogenic glycoside, as do bamboo shoots, and green potatoes contain glycoalkaloids and should be avoided. Adequate cooking can deactivate many of these toxins. A different hazard comes from handling rather than chemistry. Fruit and vegetables, especially leafy ones, have been implicated in nearly half the gastrointestinal infections caused by norovirus in the United States, often because raw produce is contaminated during preparation by an infected food handler.

• 6. Saving The Harvest

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  Losses of thirty to fifty percent can strike vegetables after harvest in developing countries that lack adequate cold storage, undone by moisture, moulds, micro-organisms, and vermin. The moment a vegetable is cut from the plant, it loses its source of water and keeps transpiring, which is why green leafy crops wilt. Different crops ask for different care. Onions and garlic can be dried for a few days in the field, while potatoes benefit from a short maturation period in warm, moist surroundings, during which wounds heal and the skin thickens. Potatoes and onions keep well and can be held until prices rise, but leafy vegetables lose moisture in storage and their vitamin C degrades rapidly. Cold is the strongest tool against decay. Cold storage suits cauliflower, eggplant, lettuce, radish, spinach, potatoes, and tomatoes, each with its own optimum temperature. Where electricity is scarce, evaporative cooling can lower temperatures without it. Storing produce in controlled atmospheres with high carbon dioxide or high oxygen can inhibit microbial growth, and ionizing radiation can preserve produce from microbial infection, insect damage, and physical deterioration without noticeably changing its properties. When fresh storage is not enough, preservation steps in. Canning deactivates enzymes and kills micro-organisms with heat, then seals out air. Freezing below minus 10 degrees Celsius halts spoilage for a short period, while minus 18 degrees Celsius is needed for longer storage, with blanching beforehand to prevent off-flavors. Older methods still hold. Sun drying serves tomatoes, mushrooms, and beans, high levels of sugar and salt block microbial growth, vinegar's acetic acid underpins pickles and chutneys, and sauerkraut relies on lactic acid bacteria fermenting chopped cabbage.

• 7. Who Feeds The World

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  In 2010, China produced over half the world's vegetables, growing 539,993 thousand tonnes on 23,458 thousand hectares, by far the largest area of land devoted to the crop. India followed at 100,045 thousand tonnes, then the United States, Turkey, Iran, and Egypt. Land and yield do not always align. China's vast acreage gave a yield of 230 thousand kilograms per hectare, but the highest average yields were obtained in Spain and the Republic of Korea, each reaching 364, far above the world average of 188. The scale of growing ranges enormously, from subsistence farmers in Africa, Asia, and South America raising enough for their families to agribusinesses with vast single-crop acreages. Most vegetables are annuals or biennials harvested within a year, and cultivation follows a steady pattern of preparing soil, sowing, tending, and harvesting. Technology now reaches deep into the field, with computer monitoring, GPS locators, and self-steering driverless machines, while a final layer of order comes from global standards. ISO 1991-1:1982 lists the botanical names of sixty-one species used as vegetables, with their common names in English, French, and Russian, a quiet attempt to pin down a word that began by meaning every growing thing.