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This article is about organic material used as soil fertilizer. For animal dung used for other purposes, see feces.
"Animal waste" redirects here. For other types of animal waste, see metabolic waste.
Animal manure is often a mixture of animal feces and bedding straw, as in this example from a stable

Manure is organic matter used as organic fertilizer in agriculture. Manures contribute to the fertility of the soil by adding organic matter and nutrients, such as nitrogen, that are trapped by bacteria in the soil. Higher organisms then feed on the fungi and bacteria in a chain of life that comprises the soil food web. It is also a product obtained after decomposition of organic matter like cow-dung which replenishes the soil with essential elements and add humus to the soil.

In the past, the term “manure” included inorganic fertilizers, but this usage is now very rare.

Types[edit]

There are three main classes of manures used in soil management:

Animal manures[edit]

Cement reservoirs, one new, and one containing cow manure mixed with water. This is common in rural Hainan Province, China.

Most animal manure is feces. Common forms of animal manure include farmyard manure (FYM) or farm slurry (liquid manure). FYM also contains plant material (often straw), which has been used as bedding for animals and has absorbed the feces and urine. Agricultural manure in liquid form, known as slurry, is produced by more intensive livestock rearing systems where concrete or slats are used, instead of straw bedding. Manure from different animals has different qualities and requires different application rates when used as fertilizer. For example horses, cattle, pigs, sheep, chickens, turkeys, rabbits, humans (sewage), and guano from seabirds and bats all have different properties.[1] For instance, sheep manure is high in nitrogen and potash, while pig manure is relatively low in both. Horses mainly eat grass and a few weeds so horse manure can contain grass and weed seeds, as horses do not digest seeds the way that cattle do. Chicken litter, coming from a bird, is very concentrated in nitrogen and phosphate and is prized for both properties.

Animal manures may be adulterated or contaminated with other animal products, such as wool (shoddy and other hair), feathers, blood, and bone. Livestock feed can be mixed with the manure due to spillage. For example, chickens are often fed meat and bone meal, an animal product, which can end up becoming mixed with chicken litter.

Compost containing turkey manure and wood chips from bedding material is dried and then applied to pastures for fertilizer.

Compost[edit]

Main article: Compost

Compost is the decomposed remnants of organic materials. It is usually of plant origin, but often includes some animal dung or bedding.

Green manure[edit]

Green manures are crops grown for the express purpose of plowing them in, thus increasing fertility through the incorporation of nutrients and organic matter into the soil. Leguminous plants such as clover are often used for this, as they fix nitrogen using Rhizobia bacteria in specialized nodes in the root structure.

Other types of plant matter used as manure include the contents of the rumens of slaughtered ruminants, spent hops (left over from brewing beer) and seaweed.

Uses of manure[edit]

Manure on a wall

Animal dung has been used for centuries as a fertilizer for farming, as it improves the soil structure (aggregation), so that it holds more nutrients and water, and becomes more fertile. Animal manure also encourages soil microbial activity, which promotes the soil's trace mineral supply, improving plant nutrition. It also contains some nitrogen and other nutrients that assist the growth of plants.

Manures with a particularly unpleasant odor (such as human sewage or slurry from intensive pig farming) are usually knifed (injected) directly into the soil to reduce release of the odor. Manure from pigs and cattle is usually spread on fields using a manure spreader. Due to the relatively lower level of proteins in vegetable matter, herbivore manure has a milder smell than the dung of carnivores or omnivores. However, herbivore slurry that has undergone anaerobic fermentation may develop more unpleasant odors, and this can be a problem in some agricultural regions. Poultry droppings are harmful to plants when fresh but, after a period of composting, are valuable fertilizers.

Manure is also commercially composted and bagged and sold retail as a soil amendment. Sometimes even human sewage sludge is used, as is the case for Dillo Dirt, a product that has been sold by the city of Austin, Texas municipal wastewater department since 1989.

Precautions[edit]

Manure generates heat as it decomposes, and it is possible for manure to ignite spontaneously if stored in a very large pile.[2] Once such a large pile of manure is burning, it will foul the air over a wide area and require considerable effort to extinguish. Therefore, large feedlots must take care to ensure that piles of fresh manure do not get excessively large. There is no serious risk of spontaneous combustion in smaller operations.[citation needed]

There is also a risk of insects carrying feces to food and water supplies, making them unsuitable for human consumption.

Livestock antibiotics[edit]

In 2007, a University of Minnesota study[3] indicated that foods such as corn, lettuce, and potatoes have been found to accumulate antibiotics from soils spread with animal manure that contains these drugs.

Organic foods may be much more or much less likely to contain antibiotics, depending on their sources and treatment of manure. For instance, by Soil Association Standard 4.7.38, most organic arable farmers either have their own supply of manure (which would, therefore, not normally contain drug residues) or else rely on green manure crops for the extra fertility (if any nonorganic manure is used by organic farmers, then it usually has to be rotted or composted to degrade any residues of drugs and eliminate any pathogenic bacteria — Standard 4.7.38, Soil Association organic farming standards). On the other hand, as found in the University of Minnesota study, the non-usage of artificial fertilizers, and resulting exclusive use of manure as fertilizer, by organic farmers can result in significantly greater accumulations of antibiotics in organic foods.[3]

See also[edit]

Notes[edit]

  1. ^ "Manure". Bbc.co.uk. Retrieved 2012-11-14. 
  2. ^ "Spontaneous Combustion of Manure Starts 200-Acre Blaze 1/08/07 |". abc7.com. Retrieved 2010-08-07. 
  3. ^ a b staff (2007-07-12). "Livestock Antibiotics Can End Up in Human Foods". Ens-newswire.com. Retrieved 2012-11-14. 

Further reading[edit]

  • Winterhalder, B., R. Larsen, and R. B. Thomas. (1974). "Dung as an essential resource in a highland Peruvian community". Human Ecology 2 (2): 89–104. doi:10.1007/BF01558115. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Manure — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
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10368 news items

 
Albany Times Union
Tue, 02 Sep 2014 05:45:00 -0700

Police said a Montgomery County man dumped manure on another vehicle. Kerry Lee Stowell was driving his tractor with a manure spreader attachment on a road and activated the spreader when a vehicle passed him, according to the Montgomery County ...
 
WNYT
Tue, 02 Sep 2014 08:33:34 -0700

JOHNSVILLE – A farmer was driving his tractor on Old State Route 5S, pulling a manure spreader, when he allegedly sprayed an oncoming car with feces on Monday, authorities said. The driver of the car was able to stop safely, authorities said. The ...

TheHorse.com (blog)

TheHorse.com (blog)
Tue, 02 Sep 2014 10:48:45 -0700

Summer is the perfect time for construction projects and a key management component for horse properties is having something useful to do with horse manure. Composting is my favorite technique and while there are many bin designs and ideas for how to ...
 
WSAU
Tue, 02 Sep 2014 00:41:15 -0700

MADISON, Wis. (WNS) - A recent manure spill of more than 1 million gallons that polluted the Little Eau Pleine River in Marathon County netted the offender a fine of only $464 from the Department of Natural Resources. Amber Meyer Smith, director of ...
 
kwwl.com
Thu, 28 Aug 2014 03:52:30 -0700

LAUREL, Iowa (AP) - Iowa regulators are investigating a hog manure spill in Jasper County, south of Laurel. The Iowa Department of Natural Resources says a farmer had called on Wednesday after spotting dead fish and crawdads in a tributary of Alloway ...
 
Times of India
Tue, 02 Sep 2014 13:48:45 -0700

Over 15 tonnes of floral waste has been collected so far and the authorities are expecting over 80 tonnes this year to be converted into manure through proper scientific processing. The project has NGO participation in the form of Samarth Bharat ...
 
Milwaukee Journal Sentinel
Fri, 15 Aug 2014 10:18:40 -0700

More than 1 million gallons of manure flowed from a small farm for months, say Marathon County officials, quickly filling a storage tank the size of a small basement, then trickling into a wetland and eventually entering the Little Eau Pleine River on ...
 
Indianapolis Star
Thu, 21 Aug 2014 15:44:44 -0700

BUTLER, Ind. — Authorities say a northeastern Indiana farm worker has died after a tractor dropped into a manure pit and pinned him. DeKalb County Sheriff Don Lauer told The (Auburn) Star that Ignacio Casillas of Ligonier died at the scene of the ...
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