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It is responsible for somewhere between 20 and 33% of the fresh water usage in the world, [57] and livestock, and the production of feed for them, occupy about a third of Earth's ice-free land. [58] Livestock production is a contributing factor in species extinction, desertification, [59] and habitat destruction. [60]
Poultry of the world (c. 1868) Poultry (/ ˈ p oʊ l t r i /) are domesticated birds kept by humans for the purpose of harvesting animal products such as meat, eggs or feathers. [1] The practice of raising poultry is known as poultry farming.
It uses between 20 and 33% of the world's fresh water, [81] Livestock, and the production of feed for them, occupy about a third of the Earth's ice-free land. [82] Livestock production contributes to species extinction, desertification, [83] and habitat destruction. [84] and is the primary driver of the Holocene extinction.
Poultry farming is the form of animal husbandry which raises domesticated birds such as chickens, ducks, turkeys and geese to produce meat or eggs for food. Poultry – mostly chickens – are farmed in great numbers.
Feed conversion ratio (FCR) is the ratio of inputs to outputs; it is the inverse of "feed efficiency" which is the ratio of outputs to inputs. [2] FCR is widely used in hog and poultry production, while FE is used more commonly with cattle. [2]
It uses between 20 and 33% of the world's fresh water, [11] Livestock, and the production of feed for them, occupy about a third of the Earth's ice-free land. [12] Livestock production contributes to species extinction, desertification, [13] and habitat destruction. [14] and is the primary driver of the Holocene extinction.
Intensive production of livestock and poultry is widespread in developed nations. For 2002–2003, the United Nations ' Food and Agriculture Organization (FAO) estimates of industrial production as a percentage of global production were 7 percent for beef and veal, 0.8 percent for sheep and goat meat, 42 percent for pork, and 67 percent for ...
In poultry-keeping, "free range" is widely confused with yarding, which means keeping poultry in fenced yards. Yarding, as well as floorless portable chicken pens ("chicken tractors") may have some of the benefits of free-range livestock but, in reality, the methods have little in common with the free-range method.