Irrigation is the application of controlled amounts of water to plants at needed intervals. Irrigation helps to grow agricultural crops, maintain landscapes, revegetate disturbed soils in dry areas and during periods of less than average rainfall. Irrigation has other uses in crop production, including frost protection, suppressing weed growth in grain fields and preventing soil consolidation. In contrast, agriculture that relies only on direct rainfall is referred to as rain-fed or dry land farming. Irrigation systems are used for cooling livestock, dust suppression, disposal of sewage, in mining. Irrigation is studied together with drainage, the removal of surface and sub-surface water from a given area. Irrigation has been a central feature of agriculture for over 5,000 years and is the product of many cultures, it was the basis for economies and societies across the globe, from Asia to the Southwestern United States. Archaeological investigation has found evidence of irrigation in areas lacking sufficient natural rainfall to support crops for rainfed agriculture.
The earliest known use of the technology dates to the 6th millennium BCE in Khuzistan in the south-west of present-day Iran. Irrigation was used as a means of manipulation of water in the alluvial plains of the Indus valley civilization, the application of it is estimated to have begun around 4500 BC and drastically increased the size and prosperity of their agricultural settlements; the Indus Valley Civilization developed sophisticated irrigation and water-storage systems, including artificial reservoirs at Girnar dated to 3000 BCE, an early canal irrigation system from c. 2600 BCE. Large-scale agriculture was practiced, with an extensive network of canals used for the purpose of irrigation. Farmers in the Mesopotamian plain used irrigation from at least the third millennium BCE, they developed perennial irrigation watering crops throughout the growing season by coaxing water through a matrix of small channels formed in the field. Ancient Egyptians practiced basin irrigation using the flooding of the Nile to inundate land plots, surrounded by dykes.
The flood water remained until the fertile sediment had settled before the engineers returned the surplus to the watercourse. There is evidence of the ancient Egyptian pharaoh Amenemhet III in the twelfth dynasty using the natural lake of the Faiyum Oasis as a reservoir to store surpluses of water for use during dry seasons; the lake swelled annually from the flooding of the Nile. The Ancient Nubians developed a form of irrigation by using a waterwheel-like device called a sakia. Irrigation began in Nubia some time between the third and second millennia BCE, it depended upon the flood waters that would flow through the Nile River and other rivers in what is now the Sudan. In sub-Saharan Africa irrigation reached the Niger River region cultures and civilizations by the first or second millennium BCE and was based on wet-season flooding and water harvesting. Evidence of terrace irrigation occurs in pre-Columbian America, early Syria and China. In the Zana Valley of the Andes Mountains in Peru, archaeologists have found remains of three irrigation canals radiocarbon-dated from the 4th millennium BCE, the 3rd millennium BCE and the 9th century CE.
These canals provide the earliest record of irrigation in the New World. Traces of a canal dating from the 5th millennium BCE were found under the 4th-millennium canal. Ancient Persia used irrigation as far back as the 6th millennium BCE to grow barley in areas with insufficient natural rainfall; the Qanats, developed in ancient Persia about 800 BCE, are among the oldest known irrigation methods still in use today. They are now found in the Middle East and North Africa; the system comprises a network of vertical wells and sloping tunnels driven into the sides of cliffs and of steep hills to tap groundwater. The noria, a water wheel with clay pots around the rim powered by the flow of the stream, first came into use at about this time among Roman settlers in North Africa. By 150 BCE the pots were fitted with valves to allow smoother filling as they were forced into the water; the irrigation works of ancient Sri Lanka, the earliest dating from about 300 BCE in the reign of King Pandukabhaya, under continuous development for the next thousand years, were one of the most complex irrigation systems of the ancient world.
In addition to underground canals, the Sinhalese were the first to build artificial reservoirs to store water. These reservoirs and canal systems were used to irrigate paddy fields, which require a lot of water to cultivate. Most of these irrigation systems still exist undamaged up to now, in Anuradhapura and Polonnaruwa, because of the advanced and precise engineering; the system was further extended during the reign of King Parakrama Bahu. The oldest known hydraulic engineers of China were Sunshu Ao of the Spring and Autumn period and Ximen Bao of the Warring States period, both of whom worked on large irrigation projects. In the Sichuan region belonging to the state of Qin of ancient China, the Dujiangyan Irrigation System devised by the Qin Chinese hydrologist and irrigation engineer Li Bing was built in 256 BCE to irrigate a vast area of farmland that today still supplies water. By the 2nd century AD, during the Han Dynasty, the Chinese used chain pumps which lifted water from a lower elevation to a higher one.
These were powered by manual foot-pedal, hydraulic waterwheels, or rotating mechanical wheels pulled by oxen. The water was used for public works, providing water for urban residential quarters and palace gardens, bu
Egypt the Arab Republic of Egypt, is a country spanning the northeast corner of Africa and southwest corner of Asia by a land bridge formed by the Sinai Peninsula. Egypt is a Mediterranean country bordered by the Gaza Strip and Israel to the northeast, the Gulf of Aqaba and the Red Sea to the east, Sudan to the south, Libya to the west. Across the Gulf of Aqaba lies Jordan, across the Red Sea lies Saudi Arabia, across the Mediterranean lie Greece and Cyprus, although none share a land border with Egypt. Egypt has one of the longest histories of any country, tracing its heritage back to the 6th–4th millennia BCE. Considered a cradle of civilisation, Ancient Egypt saw some of the earliest developments of writing, urbanisation, organised religion and central government. Iconic monuments such as the Giza Necropolis and its Great Sphinx, as well the ruins of Memphis, Thebes and the Valley of the Kings, reflect this legacy and remain a significant focus of scientific and popular interest. Egypt's long and rich cultural heritage is an integral part of its national identity, which has endured, assimilated, various foreign influences, including Greek, Roman, Ottoman Turkish, Nubian.
Egypt was an early and important centre of Christianity, but was Islamised in the seventh century and remains a predominantly Muslim country, albeit with a significant Christian minority. From the 16th to the beginning of the 20th century, Egypt was ruled by foreign imperial powers: The Ottoman Empire and the British Empire. Modern Egypt dates back to 1922, when it gained nominal independence from the British Empire as a monarchy. However, British military occupation of Egypt continued, many Egyptians believed that the monarchy was an instrument of British colonialism. Following the 1952 revolution, Egypt expelled British soldiers and bureaucrats and ended British occupation, nationalized the British-held Suez Canal, exiled King Farouk and his family, declared itself a republic. In 1958 it merged with Syria to form the United Arab Republic, which dissolved in 1961. Throughout the second half of the 20th century, Egypt endured social and religious strife and political instability, fighting several armed conflicts with Israel in 1948, 1956, 1967 and 1973, occupying the Gaza Strip intermittently until 1967.
In 1978, Egypt signed the Camp David Accords withdrawing from the Gaza Strip and recognising Israel. The country continues to face challenges, from political unrest, including the recent 2011 revolution and its aftermath, to terrorism and economic underdevelopment. Egypt's current government is a presidential republic headed by President Abdel Fattah el-Sisi, described by a number of watchdogs as authoritarian. Islam is the official religion of Egypt and Arabic is its official language. With over 95 million inhabitants, Egypt is the most populous country in North Africa, the Middle East, the Arab world, the third-most populous in Africa, the fifteenth-most populous in the world; the great majority of its people live near the banks of the Nile River, an area of about 40,000 square kilometres, where the only arable land is found. The large regions of the Sahara desert, which constitute most of Egypt's territory, are sparsely inhabited. About half of Egypt's residents live in urban areas, with most spread across the densely populated centres of greater Cairo and other major cities in the Nile Delta.
The sovereign state of Egypt is a transcontinental country considered to be a regional power in North Africa, the Middle East and the Muslim world, a middle power worldwide. Egypt's economy is one of the largest and most diversified in the Middle East, is projected to become one of the largest in the world in the 21st century. In 2016, Egypt became Africa's second largest economy. Egypt is a founding member of the United Nations, Non-Aligned Movement, Arab League, African Union, Organisation of Islamic Cooperation. "Miṣr" is the Classical Quranic Arabic and modern official name of Egypt, while "Maṣr" is the local pronunciation in Egyptian Arabic. The name is of Semitic origin, directly cognate with other Semitic words for Egypt such as the Hebrew "מִצְרַיִם"; the oldest attestation of this name for Egypt is the Akkadian "mi-iṣ-ru" related to miṣru/miṣirru/miṣaru, meaning "border" or "frontier". There is evidence of rock carvings in desert oases. In the 10th millennium BCE, a culture of hunter-gatherers and fishers was replaced by a grain-grinding culture.
Climate changes or overgrazing around 8000 BCE began to desiccate the pastoral lands of Egypt, forming the Sahara. Early tribal peoples migrated to the Nile River where they developed a settled agricultural economy and more centralised society. By about 6000 BCE, a Neolithic culture rooted in the Nile Valley. During the Neolithic era, several predynastic cultures developed independently in Upper and Lower Egypt; the Badarian culture and the successor Naqada series are regarded as precursors to dynastic Egypt. The earliest known Lower Egyptian site, predates the Badarian by about seven hundred years. Contemporaneous Lower Egyptian communities coexisted with their southern counterparts for more than two thousand years, remaining culturally distinct, but maintaining frequent contact through trade; the earliest known evidence of Egyptian hieroglyphic inscriptions appeared during the predynastic period on Naqada III pottery vessels, dated to about 3200 BCE. A unified kingdom was founded c. 3150 BCE
Asia is Earth's largest and most populous continent, located in the Eastern and Northern Hemispheres. It shares the continental landmass of Eurasia with the continent of Europe and the continental landmass of Afro-Eurasia with both Europe and Africa. Asia covers an area of 44,579,000 square kilometres, about 30% of Earth's total land area and 8.7% of the Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of many of the first civilizations. Asia is notable for not only its overall large size and population, but dense and large settlements, as well as vast populated regions, its 4.5 billion people constitute 60% of the world's population. In general terms, Asia is bounded on the east by the Pacific Ocean, on the south by the Indian Ocean, on the north by the Arctic Ocean; the border of Asia with Europe is a historical and cultural construct, as there is no clear physical and geographical separation between them. It has moved since its first conception in classical antiquity.
The division of Eurasia into two continents reflects East–West cultural and ethnic differences, some of which vary on a spectrum rather than with a sharp dividing line. The most accepted boundaries place Asia to the east of the Suez Canal separating it from Africa. China and India alternated in being the largest economies in the world from 1 to 1800 CE. China was a major economic power and attracted many to the east, for many the legendary wealth and prosperity of the ancient culture of India personified Asia, attracting European commerce and colonialism; the accidental discovery of a trans-Atlantic route from Europe to America by Columbus while in search for a route to India demonstrates this deep fascination. The Silk Road became the main east–west trading route in the Asian hinterlands while the Straits of Malacca stood as a major sea route. Asia has exhibited economic dynamism as well as robust population growth during the 20th century, but overall population growth has since fallen. Asia was the birthplace of most of the world's mainstream religions including Hinduism, Judaism, Buddhism, Taoism, Islam, Sikhism, as well as many other religions.
Given its size and diversity, the concept of Asia—a name dating back to classical antiquity—may have more to do with human geography than physical geography. Asia varies across and within its regions with regard to ethnic groups, environments, historical ties and government systems, it has a mix of many different climates ranging from the equatorial south via the hot desert in the Middle East, temperate areas in the east and the continental centre to vast subarctic and polar areas in Siberia. The boundary between Asia and Africa is the Red Sea, the Gulf of Suez, the Suez Canal; this makes Egypt a transcontinental country, with the Sinai peninsula in Asia and the remainder of the country in Africa. The border between Asia and Europe was defined by European academics; the Don River became unsatisfactory to northern Europeans when Peter the Great, king of the Tsardom of Russia, defeating rival claims of Sweden and the Ottoman Empire to the eastern lands, armed resistance by the tribes of Siberia, synthesized a new Russian Empire extending to the Ural Mountains and beyond, founded in 1721.
The major geographical theorist of the empire was a former Swedish prisoner-of-war, taken at the Battle of Poltava in 1709 and assigned to Tobolsk, where he associated with Peter's Siberian official, Vasily Tatishchev, was allowed freedom to conduct geographical and anthropological studies in preparation for a future book. In Sweden, five years after Peter's death, in 1730 Philip Johan von Strahlenberg published a new atlas proposing the Urals as the border of Asia. Tatishchev announced; the latter had suggested the Emba River as the lower boundary. Over the next century various proposals were made until the Ural River prevailed in the mid-19th century; the border had been moved perforce from the Black Sea to the Caspian Sea into which the Ural River projects. The border between the Black Sea and the Caspian is placed along the crest of the Caucasus Mountains, although it is sometimes placed further north; the border between Asia and the region of Oceania is placed somewhere in the Malay Archipelago.
The Maluku Islands in Indonesia are considered to lie on the border of southeast Asia, with New Guinea, to the east of the islands, being wholly part of Oceania. The terms Southeast Asia and Oceania, devised in the 19th century, have had several vastly different geographic meanings since their inception; the chief factor in determining which islands of the Malay Archipelago are Asian has been the location of the colonial possessions of the various empires there. Lewis and Wigen assert, "The narrowing of'Southeast Asia' to its present boundaries was thus a gradual process." Geographical Asia is a cultural artifact of European conceptions of the world, beginning with the Ancient Greeks, being imposed onto other cultures, an imprecise concept causing endemic contention about what it means. Asia does not correspond to the cultural borders of its various types of constituents. From the time of Herodotus a minority of geographers have rejected the three-continent system on the grounds that there is no substantial physical separation between
Iraq the Republic of Iraq, is a country in Western Asia, bordered by Turkey to the north, Iran to the east, Kuwait to the southeast, Saudi Arabia to the south, Jordan to the southwest and Syria to the west. The capital, largest city, is Baghdad. Iraq is home to diverse ethnic groups including Arabs, Assyrians, Shabakis, Armenians, Mandeans and Kawliya. Around 95% of the country's 37 million citizens are Muslims, with Christianity, Yarsan and Mandeanism present; the official languages of Iraq are Kurdish. Iraq has a coastline measuring 58 km on the northern Persian Gulf and encompasses the Mesopotamian Alluvial Plain, the northwestern end of the Zagros mountain range and the eastern part of the Syrian Desert. Two major rivers, the Tigris and Euphrates, run south through Iraq and into the Shatt al-Arab near the Persian Gulf; these rivers provide Iraq with significant amounts of fertile land. The region between the Tigris and Euphrates rivers known as Mesopotamia, is referred to as the cradle of civilisation.
It was here that mankind first began to read, create laws and live in cities under an organised government—notably Uruk, from which "Iraq" is derived. The area has been home to successive civilisations since the 6th millennium BC. Iraq was the centre of the Akkadian, Sumerian and Babylonian empires, it was part of the Median, Hellenistic, Sassanid, Rashidun, Abbasid, Mongol, Safavid and Ottoman empires. The country today known as Iraq was a region of the Ottoman Empire until the partition of the Ottoman Empire in the 20th century, it was made up of three provinces, called vilayets in the Ottoman language: Mosul Vilayet, Baghdad Vilayet, Basra Vilayet. In April 1920 the British Mandate of Mesopotamia was created under the authority of the League of Nations. A British-backed monarchy joining these vilayets into one Kingdom was established in 1921 under Faisal I of Iraq; the Hashemite Kingdom of Iraq gained independence from the UK in 1932. In 1958, the monarchy was overthrown and the Iraqi Republic created.
Iraq was controlled by the Arab Socialist Ba'ath Party from 1968 until 2003. After an invasion by the United States and its allies in 2003, Saddam Hussein's Ba'ath Party was removed from power, multi-party parliamentary elections were held in 2005; the US presence in Iraq ended in 2011, but the Iraqi insurgency continued and intensified as fighters from the Syrian Civil War spilled into the country. Out of the insurgency came a destructive group calling itself ISIL, which took large parts of the north and west, it has since been defeated. Disputes over the sovereignty of Iraqi Kurdistan continue. A referendum about the full sovereignty of Iraqi Kurdistan was held on 25 September 2017. On 9 December 2017, then-Iraqi Prime Minister Haider al-Abadi declared victory over ISIL after the group lost its territory in Iraq. Iraq is a federal parliamentary republic consisting of one autonomous region; the country's official religion is Islam. Culturally, Iraq has a rich heritage and celebrates the achievements of its past in both pre-Islamic as well as post-Islamic times and is known for its poets.
Its painters and sculptors are among the best in the Arab world, some of them being world-class as well as producing fine handicrafts, including rugs and carpets. Iraq is a founding member of the UN as well as of the Arab League, OIC, Non-Aligned Movement and the IMF; the Arabic name العراق al-ʿIrāq has been in use since before the 6th century. There are several suggested origins for the name. One dates to the Sumerian city of Uruk and is thus of Sumerian origin, as Uruk was the Akkadian name for the Sumerian city of Urug, containing the Sumerian word for "city", UR. An Arabic folk etymology for the name is "well-watered. During the medieval period, there was a region called ʿIrāq ʿArabī for Lower Mesopotamia and ʿIrāq ʿAjamī, for the region now situated in Central and Western Iran; the term included the plain south of the Hamrin Mountains and did not include the northernmost and westernmost parts of the modern territory of Iraq. Prior to the middle of the 19th century, the term Eyraca Arabic was used to describe Iraq.
The term Sawad was used in early Islamic times for the region of the alluvial plain of the Tigris and Euphrates rivers, contrasting it with the arid Arabian desert. As an Arabic word, عراق means "hem", "shore", "bank", or "edge", so that the name by folk etymology came to be interpreted as "the escarpment", viz. at the south and east of the Jazira Plateau, which forms the northern and western edge of the "al-Iraq arabi" area. The Arabic pronunciation is. In English, it is either or, the American Heritage Dictionary, the Random House Dictionary; the pronunciation is heard in US media. In accordance with the 2005 Constitution, the official name of the state is the "Republic of Iraq". Between 65,000 BC and 35,000 BC northern Iraq was home to a Neanderthal culture, archaeological remains of which have been discovered at Shanidar Cave This same region is the location of a number of pre-Neolithic cemeteries, dating from 11,000 BC. Since 10,000 BC, Iraq was one of centres of a Caucasoid Neolithic culture (k
The water buffalo or domestic water buffalo is a large bovid originating in the Indian subcontinent, Southeast Asia, China. Today, it is found in Europe, North America, South America and some African countries; the wild water buffalo native to Southeast Asia is considered a different species, but most represents the ancestor of the domestic water buffalo. Two extant types of domestic water buffalo are recognized based on morphological and behavioural criteria – the river buffalo of the Indian subcontinent and further west to the Balkans and Italy, the swamp buffalo, found from Assam in the west through Southeast Asia to the Yangtze valley of China in the east; the origins of the domestic water buffalo types are debated, although results of a phylogenetic study indicate that the swamp type may have originated in China and was domesticated about 4,000 years ago, while the river type may have originated in India and was domesticated about 5,000 years ago. Water buffalo were traded from the Indus Valley Civilisation to Mesopotamia, in modern Iraq, 2500 BC by the Meluhhas.
The seal of a scribe employed by an Akkadian king shows the sacrifice of water buffalo. At least 130 million domestic water buffalo exist, more people depend on them than on any other domestic animal, they are suitable for tilling rice fields, their milk is richer in fat and protein than that of dairy cattle. A large feral population became established in northern Australia in the late 19th century, there are smaller feral herds in Papua New Guinea and northeastern Argentina. Feral herds are present in New Britain, New Ireland, Irian Jaya, Guyana, Suriname and Uruguay; the skin of river buffalo is black. Swamp buffalo become slate blue later. Albinoids are present in some populations. River buffalo have comparatively longer faces, smaller girths, bigger limbs than swamp buffalo, their dorsal ridges extend further taper off more gradually. Their horns grow downward and backward curve upward in a spiral. Swamp buffalo are stockily built; the forehead is flat, the eyes prominent, the face short, the muzzle wide.
The neck is comparatively long, the withers and croup are prominent. A dorsal ridge ends abruptly just before the end of the chest, their horns grow outward, curve in a semicircle, but always remain more or less on the plane of the forehead. The tail is short, reaching only to the hocks. Height at withers is 129–133 cm for males, 120–127 cm for females, they range in weight from 300–550 kg, but weights of over 1,000 kg have been observed. Tedong bonga is a black pied buffalo featuring a unique black and white colouration, favoured by the Toraja of Sulawesi; the swamp buffalo has 48 chromosomes. The two types do not interbreed, but fertile offspring can occur. Buffalo-cattle hybrids have not been observed to occur, but the embryos of such hybrids reach maturity in laboratory experiments, albeit at lower rates than non-hybrids; the rumen of the water buffalo has important differences from that of other ruminants. It contains a larger population of bacteria the cellulolytic bacteria, lower protozoa, higher fungi zoospores.
In addition, higher rumen ammonia nitrogen and higher pH have been found as compared to those in cattle. River buffalo prefer deep water. Swamp buffalo prefer to wallow in mudholes. During wallowing, they acquire a thick coating of mud. Both are well adapted to a hot and humid climate with temperatures ranging from 0 °C in the winter to 30 °C and greater in the summer. Water availability is important in hot climates, since they need wallows, rivers, or splashing water to assist in thermoregulation; some breeds are adapted to saline sandy terrain. Water buffalo thrive on many aquatic plants. During floods, they will graze submerged, raising their heads above the water and carrying quantities of edible plants. Water buffalo eat reeds, Arundo donax, a kind of Cyperaceae, Eichhornia crassipes, Juncaceae; some of these plants are of great value to local peoples. Others, such as E. crassipes, are a major problem in some tropical valleys and water buffalo may help to keep waterways clear. Green fodders are used for intensive milk production and for fattening.
Many fodder crops are chaffed, or pulped. Fodders include alfalfa, the leaves, stems or trimmings of banana, Mangelwurzel, Leucaena leucocephala and kenaf, oats, peanut, soybean, sugarcane and turnips. Citrus pulp and pineapple wastes have been fed safely to buffalo. In Egypt, whole sun-dried dates are fed to milk buffalo up to 25% of the standard feed mixture. Swamp buffalo become reproductive at an older age than river breeds. Young males in Egypt and Pakistan are first mated at about 3.0–3.5 years of age, but in Italy they may be used as early as 2 years of age. Successful mating behaviour may continue until the animal is 12 years or older. A good river male can impregnate 100 females in a year. A strong seasonal influence on mating occurs. Heat stress reduces libido. Although buffalo are polyoestrous, their reproductive efficiency shows wide variation throughout the year. Buffalo cows exhibit a distinct seasonal change in displaying oestrus, conception rate, calving rate; the age at first oestrus of heifers varies between breeds from 13–33 months, but mating at the first oestrus is infertile and deferred unti
Ireland is an island in the North Atlantic. It is separated from Great Britain to its east by the North Channel, the Irish Sea, St George's Channel. Ireland is the second-largest island of the British Isles, the third-largest in Europe, the twentieth-largest on Earth. Politically, Ireland is divided between the Republic of Ireland, which covers five-sixths of the island, Northern Ireland, part of the United Kingdom. In 2011, the population of Ireland was about 6.6 million, ranking it the second-most populous island in Europe after Great Britain. Just under 4.8 million live in the Republic of Ireland and just over 1.8 million live in Northern Ireland. The island's geography comprises low-lying mountains surrounding a central plain, with several navigable rivers extending inland, its lush vegetation is a product of its mild but changeable climate, free of extremes in temperature. Much of Ireland was woodland until the end of the Middle Ages. Today, woodland makes up about 10% of the island, compared with a European average of over 33%, most of it is non-native conifer plantations.
There are twenty-six extant mammal species native to Ireland. The Irish climate is influenced by the Atlantic Ocean and thus moderate, winters are milder than expected for such a northerly area, although summers are cooler than those in continental Europe. Rainfall and cloud cover are abundant; the earliest evidence of human presence in Ireland is dated at 10,500 BC. Gaelic Ireland had emerged by the 1st century AD; the island was Christianised from the 5th century onward. Following the 12th century Norman invasion, England claimed sovereignty. However, English rule did not extend over the whole island until the 16th–17th century Tudor conquest, which led to colonisation by settlers from Britain. In the 1690s, a system of Protestant English rule was designed to materially disadvantage the Catholic majority and Protestant dissenters, was extended during the 18th century. With the Acts of Union in 1801, Ireland became a part of the United Kingdom. A war of independence in the early 20th century was followed by the partition of the island, creating the Irish Free State, which became sovereign over the following decades, Northern Ireland, which remained a part of the United Kingdom.
Northern Ireland saw much civil unrest from the late 1960s until the 1990s. This subsided following a political agreement in 1998. In 1973 the Republic of Ireland joined the European Economic Community while the United Kingdom, Northern Ireland, as part of it, did the same. Irish culture has had a significant influence on other cultures in the field of literature. Alongside mainstream Western culture, a strong indigenous culture exists, as expressed through Gaelic games, Irish music and the Irish language; the island's culture shares many features with that of Great Britain, including the English language, sports such as association football, horse racing, golf. The names Éire derive from Old Irish Eriu; this in turn comes from the Proto-Celtic *Iveriu, the source of Latin Hibernia. Iveriu derives from a root meaning'fat, prosperous'. During the last glacial period, up until about 10,000 BC, most of Ireland was periodically covered in ice. Sea levels were lower and Ireland, like Great Britain, formed part of continental Europe.
By 16,000 BC, rising sea levels due to ice melting caused Ireland to become separated from Great Britain. Around 6000 BC, Great Britain itself became separated from continental Europe; the earliest evidence of human presence in Ireland is dated at 10,500 BC, demonstrated by a butchered bear bone found in a cave in County Clare. It is not until about 8000 BC, that more sustained occupation of the island has been shown, with evidence for Mesolithic communities around the island; these Mesolithic communities lived as hunter-gatherers across the island until about 4000 BC. Some time before 4000 BC, Neolithic settlers arrived introducing cereal cultivars, domesticated animals such as cattle and sheep, large timber building, stone monuments; the earliest evidence for farming in Ireland or Great Britain is from Co.. Kerry, where a flint knife, cattle bones and a sheep's tooth were carbon-dated to c. 4350 BC. Field systems were developed in different parts of Ireland, including at the Céide Fields, preserved beneath a blanket of peat in present-day Tyrawley.
An extensive field system, arguably the oldest in the world, consisted of small divisions separated by dry-stone walls. The fields were farmed for several centuries between 3500 BC and 3000 BC. Wheat and barley were the principal crops; the Bronze Age – defined by the use of metal – began around 2500 BC, with technology changing people's everyday lives during this period through innovations such as the wheel. According to John T. Koch and others, Ireland in the Late Bronze Age was part of a maritime trading-network culture called the Atlantic Bronze Age that included Britain, western France and Iberia, that this is where Celtic languages developed; this contrasts with the traditional view that their origin lies in mainland Europe with the Hallstatt culture. During the Iron Age, a Celtic language and culture emerged in Ireland. How and when the island became Celtic has been debated for close to a century, with the migrations of the Celts being one of the more enduring themes of archaeological and linguistic studies.
The most recent genetic research s
Turmeric is a flowering plant of the ginger family, the roots of which are used in cooking. The plant is rhizomatous and perennial, is native to the Indian subcontinent and Southeast Asia, requires temperatures between 20 and 30 °C and a considerable amount of annual rainfall to thrive. Plants are gathered each year for their rhizomes, some for propagation in the following season and some for consumption; when not used fresh, the rhizomes are boiled in water for about 30–45 minutes and dried in hot ovens, after which they are ground into a deep orange-yellow powder used as a coloring and flavoring agent in many Asian cuisines for curries, as well as for dyeing. Turmeric powder has a warm, black pepper-like flavor and earthy, mustard-like aroma. Although long used in Ayurvedic medicine, where it is known as haridra, no high-quality clinical evidence exists for use of turmeric or its constituent, curcumin, as a therapy. Turmeric has been used in Asia for thousands of years and is a major part of Ayurveda, Siddha medicine, traditional Chinese medicine and the animistic rituals of Austronesian peoples.
It was first used as a dye, later for its supposed properties in folk medicine. Although the precise origin of turmeric is not known, it appears to have originated from tropical Southeast Asia, it is most associated with India today. The greatest diversity of Curcuma species by number alone is at around 40 to 45 species. Thailand is much smaller than India. Other countries in tropical Asia have numerous wild species of Curcuma. Recent studies have shown that the taxonomy of Curcuma longa is problematic, with only the specimens from South India being identifiable as C. longa. The phylogeny, relationships and interspecific variation, identity of other species and cultivars in other parts of the world still need to be established and validated. Various species utilized and sold as "turmeric" in other parts of Asia have been shown to belong to several physically similar taxa, with overlapping local names. Furthermore, in the case of the use and spread of turmeric by the Austronesian peoples into Oceania and Madagascar, there is strong linguistic and circumstantial evidence that it pre-dated contact with India.
The populations in Polynesia and Micronesia, in particular, never came into contact with India, but use turmeric for both food and dye. Thus independent domestication events are likely; the origin of the name is Indian. It derives from Middle English or Early Modern English as turmeryte or tarmaret, it may be of terra merita. The name of the genus, Curcuma, is derived from the Sanskrit kuṅkuma, referring to both turmeric and saffron, used in India since ancient times. Turmeric is a perennial herbaceous plant. Branched, yellow to orange, aromatic rhizomes are found; the leaves are arranged in two rows. They are divided into leaf sheath and leaf blade. From the leaf sheaths, a false stem is formed; the petiole is 50 to 115 cm long. The simple leaf blades are 76 to 115 cm long and up to 230 cm, they are oblong to elliptical, narrowing at the tip. At the top of the inflorescence, stem bracts are present on; the hermaphrodite flowers are threefold. The three sepals are 0.8 to 1.2 cm long and white, have fluffy hairs.
The three bright-yellow petals are fused into a corolla tube up to 3 cm long. The three corolla lobes have a length of 1.0 to 1.5 cm and are triangular with soft-spiny upper ends. While the average corolla lobe is larger than the two lateral, only the median stamen of the inner circle is fertile; the dust bag is spurred at its base. All other stamens are converted to staminodes; the outer staminodes are shorter than the labellum. The labellum is yellowish, with a yellow ribbon in its center and it is obovate, with a length from 1.2 to 2.0 cm. Three carpels are under a constant, trilobed ovary adherent, sparsely hairy; the fruit capsule opens with three compartments. In East Asia, the flowering time is in August. Terminally on the false stem is an inflorescence; the bracts are ovate to oblong with a blunt upper end with a length of 3 to 5 cm. Turmeric powder is about 60–70% carbohydrates, 6–13% water, 6–8% protein, 5–10% fat, 3–7% dietary minerals, 3–7% essential oils, 2–7% dietary fiber, 1–6% curcuminoids.
Phytochemical components of turmeric include diarylheptanoids, a class including numerous curcuminoids, such as curcumin, demethoxycurcumin, bisdemethoxycurcumin. Curcumin constitutes up to 3.14% of assayed commercial samples of turmeric powder. Some 34 essential oils are present in turmeric, among which turmerone, germacrone and zingiberene are major constituents. Turmeric is one of the key ingredients in many Asian dishes, imparting a mustard-like, earthy aroma and pungent bitter flavor to foods, it is used in savory dishes, but is used in some sweet dishes, such as the cake sfouf. In India, turmeric leaf is used to prepare special sweet dishes, patoleo, by layering rice flour and coconut-jaggery mixture on the leaf closing and steaming it in a special u