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The chicken breeds recognized by the American Poultry Association are listed in the American Standard of Perfection. They are categorized into classes: standard-sized breeds are grouped by type or by place of origin, while bantam breeds are classified according to type or physical characteristics.
The Illinois River, which flows between Arkansas and Oklahoma, has had a high level of pollution due to water runoff contaminated with chicken manure. [57] The incineration of poultry wastes has been shown to have dangerous levels of a number of airborne pollutants, including heavy metals, arsenic, and halogens such as chlorine. [58]
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. More than 60 billion chickens are killed for consumption annually.
Illustration of thirty-nine varieties of chicken (and one Guinea Fowl) . There are hundreds of chicken breeds in existence. [1] Domesticated for thousands of years, distinguishable breeds of chicken have been present since the combined factors of geographical isolation and selection for desired characteristics created regional types with distinct physical and behavioral traits passed on to ...
Selective crop breeding was also employed. Corn is a domestic plant and cannot grow on its own. The first corn grown by Native Americans had small ears, and only produced a few kernels per ear. By 2,000 years ago, single stalks with large ears were being produced. [37] Native Americans created over 700 varieties of corn by 1500 AD. [citation ...
In Malaysia they are described as brave warriors and archangel chickens, because of their very human like appearance. They are the smallest breed of chicken in the world. Seramas are typically under 500 g (18 oz), but even smaller birds weighing under 250 g (8.8 oz) have been bred in its native Malaysia.
Subsistence farming is being superseded by intensive animal farming in the more developed parts of the world, where, for example, beef cattle are kept in high-density feedlots, and thousands of chickens may be raised in broiler houses or batteries. On poorer soil, such as in uplands, animals are often kept more extensively and may be allowed to ...
There were 2786 regulated chicken producers, generating farm cash receipts of $1.6 billion in 2005. Compared to other livestock sectors (i.e. beef, dairy, and pork), the poultry and egg industry was the healthiest with regards to total income for the average operator. [1] In 2005, total chicken slaughters were 973.9 million kilograms.