Portal:Agriculture
Wikipedia portal for content related to Agriculture / From Wikipedia, the free encyclopedia
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The Agriculture Portal
Agriculture encompasses crop and livestock production, aquaculture, fisheries, and forestry for food and non-food products. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. While humans started gathering grains at least 105,000 years ago, nascent farmers only began planting them around 11,500 years ago. Sheep, goats, pigs, and cattle were domesticated around 10,000 years ago. Plants were independently cultivated in at least 11 regions of the world. In the 20th century, industrial agriculture based on large-scale monocultures came to dominate agricultural output.
, small farms produce about one-third of the world's food, but large farms are prevalent. The largest 1% of farms in the world are greater than 50 hectares (120 acres) and operate more than 70% of the world's farmland. Nearly 40% of agricultural land is found on farms larger than 1,000 hectares (2,500 acres). However, five of every six farms in the world consist of fewer than 2 hectares (4.9 acres), and take up only around 12% of all agricultural land. Farms and farming greatly influence rural economics and greatly shape rural society, effecting both the direct agricultural workforce and broader businesses that support the farms and farming populations.
The major agricultural products can be broadly grouped into foods, fibers, fuels, and raw materials (such as rubber). Food classes include cereals (grains), vegetables, fruits, cooking oils, meat, milk, eggs, and fungi. Global agricultural production amounts to approximately 11 billion tonnes of food, 32 million tonnes of natural fibres and 4 billion m3 of wood. However, around 14% of the world's food is lost from production before reaching the retail level.
Modern agronomy, plant breeding, agrochemicals such as pesticides and fertilizers, and technological developments have sharply increased crop yields, but also contributed to ecological and environmental damage. Selective breeding and modern practices in animal husbandry have similarly increased the output of meat, but have raised concerns about animal welfare and environmental damage. Environmental issues include contributions to climate change, depletion of aquifers, deforestation, antibiotic resistance, and other agricultural pollution. Agriculture is both a cause of and sensitive to environmental degradation, such as biodiversity loss, desertification, soil degradation, and climate change, all of which can cause decreases in crop yield. Genetically modified organisms are widely used, although some countries ban them. (Full article...)
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There are several methods of irrigation that differ in how water is supplied to plants. Surface irrigation, also known as gravity irrigation, is the oldest form of irrigation and has been in use for thousands of years. In sprinkler irrigation, water is piped to one or more central locations within the field and distributed by overhead high-pressure water devices. Micro-irrigation is a system that distributes water under low pressure through a piped network and applies it as a small discharge to each plant. Micro-irrigation uses less pressure and water flow than sprinkler irrigation. Drip irrigation delivers water directly to the root zone of plants. Subirrigation has been used in field crops in areas with high water tables for many years. It involves artificially raising the water table to moisten the soil below the root zone of plants. (Full article...) (Full article...)
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Did you know...
... there are roughly 200,000 varieties of animal pollinators in the wild, most of which are insects?[1] |
Other "Did you know" facts... | Read more... |
General images
- Image 1Ploughing with a yoke of horned cattle in Ancient Egypt. Painting from the burial chamber of Sennedjem, c. 1200 BC. (from History of agriculture)
- Image 2Early 20th-century image of a tractor ploughing an alfalfa field (from History of agriculture)
- Image 3Roman harvesting machine, a vallus, from a Roman wall in Belgium, which was then part of the province of Gallia Belgica (from History of agriculture)
- Image 5This Australian road sign uses the less common term "stock" for livestock. (from Livestock)
- Image 7Biomass distribution of humans, livestock, and other animals (from Livestock)
- Image 8Agricultural scenes of threshing, a grain store, harvesting with sickles, digging, tree-cutting and ploughing from Ancient Egypt. Tomb of Nakht, 15th century BC. (from History of agriculture)
- Image 9The Yecoro wheat (right) cultivar is sensitive to salinity, plants resulting from a hybrid cross with cultivar W4910 (left) show greater tolerance to high salinity (from Plant breeding)
- Image 10An Indian farmer with a rock-weighted scratch plough pulled by two oxen. Similar ploughs were used throughout antiquity. (from History of agriculture)
- Image 11Clay and wood model of a bull cart carrying farm produce in large pots, Mohenjo-daro. The site was abandoned in the 19th century BC. (from History of agriculture)
- Image 12Noria wheels to lift water for irrigation and household use were among the technologies introduced to Europe via Al-Andalus in the medieval Islamic world. (from History of agriculture)
- Image 13Agriculture terraces were (and are) common in the austere, high-elevation environment of the Andes. (from History of agriculture)
- Image 14Goat family with one-week-old kid (from Livestock)
- Image 15Garton's catalogue from 1902 (from Plant breeding)
- Image 19In vitro-culture of Vitis (grapevine), Geisenheim Grape Breeding Institute (from Plant breeding)
- Image 20Selective breeding enlarged desired traits of the wild cabbage plant (Brassica oleracea) over hundreds of years, resulting in dozens of today's agricultural crops. Cabbage, kale, broccoli, and cauliflower are all cultivars of this plant. (from Plant breeding)
- Image 21Global distribution data for cattle, buffaloes, horses, sheep, goats, pigs, chickens and ducks in 2010 (from Livestock)
- Image 22Norman Borlaug, father of the Green Revolution of the 1970s, is credited with saving over a billion people worldwide from starvation. (from History of agriculture)
- Image 23A Fordson Dexta tractor with a rollover protection structure bar retro-fitted. (from Agricultural safety and health)
- Image 24Chronological dispersal of Austronesian peoples across the Indo-Pacific (from History of agriculture)
- Image 25Centres of origin identified by Nikolai Vavilov in the 1930s. Area 3 (grey) is no longer recognised as a centre of origin, and Papua New Guinea (red, 'P') was identified more recently. (from History of agriculture)
- Image 26Magnified 100X, and stained with H&E (hematoxylin and eosin) staining technique, this light photomicrograph of brain tissue reveals the presence of prominent spongiotic changes in the cortex, and loss of neurons in a case of variant Creutzfeldt-Jakob disease (vCJD). (from Agricultural safety and health)
- Image 27Wichita village of grass houses surrounded by maize fields in the United States. (from History of agriculture)
- Image 29The creation of maize from teosinte (top), maize-teosinte hybrid (middle), to maize (bottom) (from History of agriculture)
- Image 31Modern facilities in molecular biology are now used in plant breeding. (from Plant breeding)
- Image 35Bt-toxins in genetically modified peanut leaves (bottom) protect from damage by corn borers (top). (from History of agriculture)
- Image 36Pesticide application for chemical control of nematodes in a sunflower planted field. Karaisalı, Adana - Turkey. (from Agricultural safety and health)
- Image 37A Northern Song era (960–1127 AD) Chinese watermill for dehusking grain with a horizontal waterwheel (from History of agriculture)
- Image 39Pigs being loaded into their transport (from Livestock)
- Image 40The agriculturalist Charles 'Turnip' Townshend introduced four-field crop rotation and the cultivation of turnips. (from History of agriculture)
- Image 41Native millet, Panicum decompositum, was planted and harvested by Indigenous Australians in eastern central Australia. (from History of agriculture)
- Image 42Livestock production requires large areas of land.
- Image 43Agricultural research on potato plants (from Plant breeding)
- Image 45Agricultural calendar, c. 1470, from a manuscript of Pietro de Crescenzi (from History of agriculture)
- Image 46The Occupational Safety & Health Administration logo. (from Agricultural safety and health)
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Agriculture journals
- Agronomy Journal - the American Society of Agronomy
- Agronomy for Sustainable Development Journal
- European Journal of Agronomy
- Journal of Agronomy and Crop Science
- Journal of Organic Systems
- Agriculture, Ecosystems & Environment
- Agriculture and Human Values
- Computers and Electronics in Agriculture
- Precision Agriculture
- Experimental Agriculture
- Journal of Integrative Agriculture
- Journal of the Science of Food and Agriculture
- Renewable Agriculture and Food Systems
- Biological Agriculture & Horticulture
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