Potato in the context of Apple (symbolism)

The Andean civilizations were South American complex societies of many indigenous people. They stretched down the spine of the Andes for 4,000 km (2,500 miles) from southern Colombia, to Ecuador and Peru, including the deserts of coastal Peru, to north Chile and northwest Argentina. Archaeologists believe that Andean civilizations first developed on the narrow coastal plain of the Pacific Ocean. The Caral or Norte Chico civilization of coastal Peru is the oldest known civilization in the Americas, dating back to 3500 BCE. Andean civilizations are one of at least five civilizations in the world deemed by scholars to be "pristine." The concept of a "pristine" civilization refers to a civilization that has developed independently of external influences and is not a derivative of other civilizations.

Despite the severe environmental challenges of high mountains and hyper-arid desert, the Andean civilizations domesticated a wide variety of crops, some of which, such as potatoes, peppers, peanuts, manioc, chocolate, and coca, became of worldwide importance. The Andean civilizations were noteworthy for monumental architecture, an extensive road system, textile weaving, and many unique characteristics of the societies they created.

A staple food, food staple, or simply staple, is a food that is eaten often and in such quantities that it constitutes a dominant portion of a standard diet for an individual or a population group, supplying a large fraction of energy needs and generally forming a significant proportion of the intake of other nutrients as well. For humans, a staple food of a specific society may be eaten as often as every day or every meal, and most people live on a diet based on just a small variety of food staples. Specific staples vary from place to place, but typically are inexpensive or readily available foods that supply one or more of the macronutrients and micronutrients needed for survival and health: carbohydrates, proteins, fats, minerals and vitamins. Typical examples include grains (cereals and legumes), seeds, nuts and root vegetables (tubers and roots). Among them, cereals (rice, wheat, oat, maize, etc.), legumes (lentils and beans) and tubers (e.g. potato, taro and yam) account for about 90% of the world's food calorie intake.

Early agricultural civilizations valued the crop foods that they established as staples because, in addition to providing necessary nutrition, they generally are suitable for storage over long periods of time without decay. Such nonperishable foods are the only possible staples during seasons of shortage, such as dry seasons or cold temperate winters, against which times harvests have been stored. During seasons of surplus, wider choices of foods may be available.

A pseudocereal or pseudograin is one of any non-grasses that are used in much the same way as cereals (true cereals are grasses). Pseudocereals can be further distinguished from other non-cereal staple crops (such as potatoes) by their being processed like a cereal: their seed can be ground into flour and otherwise used as a cereal. Prominent examples of pseudocereals include amaranth (love-lies-bleeding, red amaranth, Prince-of-Wales-feather), quinoa, and buckwheat. The pseudocereals have a good nutritional profile, with high levels of essential amino acids, essential fatty acids, minerals, and some vitamins. The starch in pseudocereals has small granules and low amylose content (except for buckwheat), which gives it similar properties to waxy-type cereal starches. The functional properties of pseudocereals, such as high viscosity, water-binding capacity, swelling capability, and freeze-thaw stability, are determined by their starch properties and seed morphology. Pseudocereals are gluten-free, and they are used to make 100% gluten-free products, which has increased their popularity.

European cuisine (also known as Continental cuisine) comprises the cuisines originating from the various countries of Europe.

The cuisines of European countries are diverse, although some common characteristics distinguish them from those of other regions. Compared to traditional cooking of East Asia, meat holds a more prominent and substantial role in serving size. Many dairy products are utilised in cooking. There are hundreds of varieties of cheese and other fermented milk products. White wheat-flour bread has long been the prestige starch, but historically, most people ate bread, flatcakes, or porridge made from rye, spelt, barley, and oats. Those better off would also make pasta, dumplings and pastries. The potato has become a major starch plant in the diet of Europeans and their diaspora since the European colonisation of the Americas. Maize is much less common in most European diets than it is in the Americas; however, cornmeal (polenta or mămăligă) is a major part of the cuisines of Italy, the Balkans and the Caucasus. Although flatbreads (especially those with toppings, such as pizza or tarte flambée) and rice are eaten in Europe, they are only staple foods in limited areas, particularly in Southern Europe. Salads—cold dishes with uncooked or cooked vegetables, sometimes with a dressing—are an integral part of European cuisine.

High-yielding varieties (abbreviated as HYVs) of agricultural crops are varieties of crops that are usually characterized by a combination of the following traits in contrast to the conventional ones:

• Higher crop yield per unit area
• Higher quality of crops
• Improved response to fertilizers
• Early maturation
• Resistance to droughts and floods
• High reliance on irrigation and fertilizers (see intensive farming)
• Dwarfness (smaller size)
• Resistance to many diseases and insects.

The most popular HYVs can be found among wheat, corn, soybean, rice, potato, and cotton. They are heavily used in commercial and plantation farms.

Starch or amylum is a polymeric carbohydrate consisting of numerous glucose units joined by glycosidic bonds. This polysaccharide is produced by most green plants for energy storage. Worldwide, it is the most common carbohydrate in human diets, and is contained in large amounts in staple foods such as wheat, potatoes, maize (corn), rice, and cassava (manioc).

Pure starch is a white, tasteless and odorless powder that is insoluble in cold water or alcohol. It consists of two types of molecules: the linear and helical amylose and the branched amylopectin. Depending on the plant, starch generally contains 20 to 25% amylose and 75 to 80% amylopectin by weight. Glycogen, the energy reserve of animals, is a more highly branched version of amylopectin.

Agriculture in the Soviet Union was mostly collectivized, with some limited cultivation of private plots. It is often viewed as one of the more inefficient sectors of the economy of the Soviet Union. A number of food taxes (mainly prodrazverstka and prodnalog) were introduced in the early Soviet period despite the Decree on Land that immediately followed the October Revolution. The forced collectivization and class war against (vaguely defined) "kulaks" under Stalinism greatly disrupted farm output in the 1920s and 1930s, contributing to the Soviet famine of 1932–33 (most especially the Holodomor in Ukraine). A system of state and collective farms, known as sovkhozes and kolkhozes, respectively, placed the rural population in a system intended to be unprecedentedly productive and fair but which turned out to be chronically inefficient and lacking in fairness. Under the administrations of Nikita Khrushchev, Leonid Brezhnev, and Mikhail Gorbachev, many reforms (such as Khrushchev's Virgin Lands Campaign) were enacted as attempts to defray the inefficiencies of the Stalinist agricultural system. However, Marxist–Leninist ideology did not allow for any substantial amount of market mechanism to coexist alongside central planning, so the private plot fraction of Soviet agriculture, which was its most productive, remained confined to a limited role. Throughout its later decades the Soviet Union never stopped using substantial portions of the precious metals mined each year in Siberia to pay for grain imports, which has been taken by various authors as an economic indicator showing that the country's agriculture was never as successful as it ought to have been. The real numbers, however, were treated as state secrets at the time, so accurate analysis of the sector's performance was limited outside the USSR and nearly impossible to assemble within its borders. However, Soviet citizens as consumers were familiar with the fact that foods, especially meats, were often noticeably scarce, to the point that not lack of money so much as lack of things to buy with it was the limiting factor in their standard of living.

Despite immense land resources, extensive farm machinery and agrochemical industries, and a large rural workforce, Soviet agriculture was relatively unproductive. Output was hampered in many areas by the climate and poor worker productivity. However, Soviet farm performance was not uniformly bad. Organized on a large scale and relatively highly mechanized, its state and collective agriculture made the Soviet Union one of the world's leading producers of cereals, although bad harvests (as in 1972 and 1975) necessitated imports and slowed the economy. The 1976–1980 five-year plan shifted resources to agriculture, and 1978 saw a record harvest. Conditions were best in the temperate chernozem (black earth) belt stretching from Ukraine through southern Russia into the east, spanning the extreme southern portions of Siberia. In addition to cereals, cotton, sugar beets, potatoes, and flax were also major crops. Such performance showed that underlying potential was not lacking, which was not surprising as the agriculture in the Russian Empire was traditionally amongst the highest producing in the world, although rural social conditions since the October Revolution were hardly improved. Grains were mostly produced by the sovkhozes and kolkhozes, but vegetables and herbs often came from private plots.

The European potato failure was a food crisis that struck Northern and Western Europe in the mid-1840s. The time is also known as the Hungry Forties. The widespread failure of potato crops, caused by potato blight, with the correspondent lack of other staple foods was the direct cause of the crisis. Excess mortality occurred across all affected areas, with the highest casualty rates occurring in the Scottish Highlands and Ireland via the Highland Potato Famine and Great Famine respectively. Mass emigration occurred as a result.

Tubers are a type of enlarged structure that plants use as storage organs for nutrients, derived from stems or roots. Tubers help plants perennate (survive winter or dry months), provide energy and nutrients, and are a means of asexual reproduction.

Stem tubers manifest as thickened rhizomes (underground stems) or stolons (horizontal connections between organisms); examples include the potato and yam. The term root tuber describes modified lateral roots, as in sweet potato, cassava, and dahlia.

The sweet potato or sweetpotato (Ipomoea batatas) is a dicotyledonous plant in the morning glory family, Convolvulaceae. Its sizeable, starchy, sweet-tasting tuberous roots are used as a root vegetable, which is a staple food in parts of the world. Cultivars of the sweet potato have been bred to bear tubers with flesh and skin of various colors. Moreover, the young shoots and leaves are occasionally eaten as greens. The sweet potato and the potato are only distantly related, both being in the order Solanales. Although darker sweet potatoes are often known as "yams" in parts of North America, they are even more distant from actual yams, which are monocots in the order Dioscoreales.

The sweet potato is native to the tropical regions of South America in what is present-day Ecuador. Of the approximately 50 genera and more than 1,000 species of Convolvulaceae, I. batatas is the only crop plant of major importance—some others are used locally (e.g., I. aquatica "kangkong" as a green vegetable), but many are poisonous. The genus Ipomoea that contains the sweet potato also includes several garden flowers called morning glories, but that term is not usually extended to I. batatas. Some cultivars of I. batatas are grown as ornamental plants under the name tuberous morning glory, and used in a horticultural context. Sweet potatoes can also be called yams in North America. When soft varieties were first grown commercially there, there was a need to differentiate between the two. Enslaved Africans had already been calling the 'soft' sweet potatoes 'yams' because they resembled the unrelated yams in Africa. Thus, 'soft' sweet potatoes were referred to as 'yams' to distinguish them from the 'firm' varieties.

Helmand (Pashto and Dari: هلمند), known in ancient times as Hermand, Hirmand, and Hethumand, is one of the 34 provinces of Afghanistan, in the south of the country. It is the largest province by area, covering 58,584 square kilometres (20,000 sq mi) area. The province contains 18 districts, encompassing over 1,000 villages, and roughly 1,446,230 settled people. Lashkargah serves as the provincial capital. Helmand was part of the Greater Kandahar region until made into a separate province by the Afghan government in the 20th century. It is largely populated by Pashtuns.

The Helmand River flows through the mainly desert region of the province, providing water used for irrigation. The Kajaki Dam, which is one of Afghanistan's major reservoirs, is located in the Kajaki district. Helmand is believed to be one of the world's largest opium producing regions, responsible for around 42% of the world's total production. This is believed to be more than the whole of Myanmar, which is the second-largest producing nation after Afghanistan. The region also produces tobacco, sugar beets, cotton, sesame, wheat, mung beans, maize, nuts, sunflowers, onions, potato, tomato, cauliflower, peanut, apricot, grape, and melon. The province has a domestic airport (Bost Airport), in the city of Lashkargah that was heavily used by NATO-led forces. The former British Camp Bastion and the U.S. Camp Leatherneck is a short distance southwest of Lashkargah.

Phytophthora infestans is an oomycete or water mold, a fungus-like microorganism that causes the serious potato and tomato disease known as late blight or potato blight. Early blight, caused by Alternaria solani, is also often called "potato blight". Late blight was a major culprit in the 1840s European, the 1845–1852 Irish, and the 1846 Highland potato famines. The organism can also infect some other members of the Solanaceae. The pathogen is favored by moist, cool environments: sporulation is optimal at 12–18 °C (54–64 °F) in water-saturated or nearly saturated environments, and zoospore production is favored at temperatures below 15 °C (59 °F). Lesion growth rates are typically optimal at a slightly warmer temperature range of 20 to 24 °C (68 to 75 °F).

The tomato (US: /təˈmeɪtoʊ/, UK: /təˈmɑːtoʊ/; Solanum lycopersicum) is a plant whose fruit is an edible berry that is eaten as a vegetable. The tomato is a member of the nightshade family that includes tobacco, potato, and chili peppers. It originated from western South America, and may have been domesticated there or in Mexico (Central America). It was introduced to the Old World by the Spanish in the Columbian exchange in the 16th century.

Tomato plants are vines, largely annual and vulnerable to frost, though sometimes living longer in greenhouses. The flowers are able to self-fertilise. Modern varieties have been bred to ripen uniformly red, in a process that has impaired the fruit's sweetness and flavor. There are thousands of cultivars, varying in size, color, shape, and flavor. Tomatoes are attacked by many insect pests and nematodes, and are subject to diseases caused by viruses and by mildew and blight fungi.

Asterids are a large clade (monophyletic group) of flowering plants, composed of 17 orders and more than 80,000 species, about a third of the total flowering plant species. The asterids are divided into the unranked clades lamiids (8 orders) and campanulids (7 orders), and the single orders Cornales and Ericales. Well-known asterids include dogwoods and hydrangeas (order Cornales), tea, blueberries, cranberries, kiwifruit, Brazil nuts, argan, sapote, and azaleas (order Ericales), sunflowers, lettuce, common daisy, yacon, carrots, celery, parsley, parsnips, ginseng, ivies, holly, honeysuckle, elder, and valerian (clade campanulids), borage, forget-me-nots, comfrey, coffee, frangipani, gentian, pong-pong, oleander, periwinkle, basil, mint, rosemary, sage, oregano, thyme, lavender, wild dagga, olives, ash, teak, foxgloves, lilac, jasmine, snapdragons, African violets, butterfly bushes, sesame, psyllium, potatoes, eggplants, tomatoes, chilli peppers, tobacco, petunias, morning glory, and sweet potato (clade lamiids).

Most of the taxa belonging to this clade had been referred to as Asteridae in the Cronquist system (1981) and as Sympetalae in earlier systems. The name asterids (not necessarily capitalised) resembles the earlier botanical name but is intended to be the name of a clade rather than a formal ranked name, in the sense of the ICBN.

Eggplant (in North American, Australian, and Philippine English), aubergine (in British, Irish, and New Zealand English), brinjal (in Bangladeshi, Indian, Singapore, Malaysian, South African, and Sri Lankan English), or baigan (in Caribbean English) is a plant species in the nightshade family Solanaceae. Solanum melongena is grown worldwide for its edible fruit, typically used as a vegetable in cooking.

Most commonly purple, the spongy, absorbent fruit is used in several cuisines. It is a berry by botanical definition. As a member of the genus Solanum, it is related to the tomato, chili pepper, and potato, although those are of the Americas region while the eggplant is of the Eurasia region. Like the tomato, its skin and seeds can be eaten, but it is usually eaten cooked. Eggplant is nutritionally low in macronutrient and micronutrient content, but the capability of the fruit to absorb oils and flavors into its flesh through cooking expands its use in the culinary arts.

The potato fruit, also known as a potato berry, is the part of the potato plant that, after flowering, produces a toxic, green cherry tomato-like fruit.

Atropa bella-donna, commonly known as deadly nightshade or belladonna, is a toxic perennial herbaceous plant in the nightshade family Solanaceae, which also includes tomatoes, potatoes and eggplant. It is native to Europe and Western Asia, including Turkey, its distribution extending from England in the west to western Ukraine and the Iranian province of Gilan in the east. It is also naturalised or introduced in some parts of Canada, North Africa and the United States.

The foliage and berries are extremely toxic when ingested, containing tropane alkaloids. It can also be harmful to handle and/or touch these plants. These toxins include atropine, scopolamine, and hyoscyamine, which cause delirium and hallucinations, and are also used as pharmaceutical anticholinergics. Tropane alkaloids are of common occurrence not only in the Old World tribes Hyoscyameae (to which the genus Atropa belongs) and Mandragoreae, but also in the New World tribe Datureae—all of which belong to the subfamily Solanoideae of the plant family Solanaceae.

The epidermis (from the Greek ἐπιδερμίς, meaning "over-skin") is a single layer of cells that covers the leaves, flowers, roots and stems of plants. It forms a boundary between the plant and the external environment. The epidermis serves several functions: it protects against water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients. The epidermis of most leaves shows dorsoventral anatomy: the upper (adaxial) and lower (abaxial) surfaces have somewhat different construction and may serve different functions. Woody stems and some other stem structures such as potato tubers produce a secondary covering called the periderm that replaces the epidermis as the protective covering.