### fertilizer:

Manure
* Most manure contains residues
  - seeds
  - zinc
* Most manure is produced by animals
  - livestock
* Some manure also contains traces of hormones, heavy metals, or antibiotics.
* Some manure contains nitrogen
  - derives from animals
  - emits gases
  - encourages vegetative growth
  - includes age manure
* Some manure is produced by earthworms
  - humans
* adds nutrients.
* aerates the soil and helps it absorb and cling to water.
* also consumes large quantities of oxygen as it decomposes
  - degrades salmon habitat
  - feeds the earthworms which are important for soil aeration
  - harms salmon habitat
  - improves biological activity, soil tilth, and soil chemical properties
  - supplies humus which helps the soil hold water
* are rich sources of bacteria, phosphates, and nitrates
  - the original slow-release nitrogen fertilizer
  - usually less expensive than other animal by-products
* can also be a source of organic matter
  - cause nuisance problems, such as odors and pests
* can be a source of nitrogen, phosphorus, salts, and bacteria
  - an excellent and valuable substitute for commercial fertilizer
* can contribute a variety of nutrients and bacteria
  - nutrients and disease-causing organisms to both surface water and groundwater
  - encourage iris soft rot
  - play a part in meeting soybean nutrient needs
  - pollute drinking and surface water with nitrates, parasites, bacteria and viruses
  - then contaminate a water source
* carries with it other substances that are used on industrial farms.
* causes increases of microbial predators, while decreasing the abundance of plant parasites.
* combination of feces and urine.
* comes from cattle.
* complete fertilizer, but low in nutrients.
* complete fertilizer, but low in the amount of nutrients it supplies
  - amounts of nutrients it can supply
* contains an appreciable amount of nitrogen.
* contains nitrogen in several forms
  - which helps with the composting of plant wastes
  - nitrogen, phosphorus, inorganic salts, organic solids and microorganisms
  - pathogens, which can cause intestinal problems
  - the same nutrients
  - valuable organic materials and nutrients crucial to the health of soil and crops
* decreases the oxygen in the water and as a result, the fish suffocate.
* does add some nutrition as well as organic matter.
* emits various gases, particularly ammonia into the air.
* even has small amounts of plant nutrients.
* exits slightly above the soil surface through the supply tube between the disks.
* favorite place for flies to lay their eggs.
* fertilizes the fields upon which cows graze.
* food source for earthworms.
* fumes and rotting carcasses cause poultry workers to wear gas masks.
* gases all behave differently and interact in unpredictable ways.
* good, non-chemical fertilizer.
* habitat for the tetanus spore.
* has beneficial effects
  - benefits
  - characteristics
* helps fuel the composting process when the weather warms.
* increases soil fertility by supplying requisite elements.
* increases the loading of nutrients and decreases dissolved oxygen demand
  - soil's organic matter and improves physical structure
* is air-dried in storage
  - also a non-ideal fertilizer in many ways
* is also a source of bacteria that are human pathogens
  - the greenhouse gas methane
  - an excellent source of plant nutrients and organic matter
  - helpful in improving soil fertility in cut areas from land leveling
  - an alternative to a commercial fertilizer
* is an excellent breeding site for houseflies
  - inevitable byproduct of livestock and poultry production
* is an organic fertiliser
  - fertilizer but plants can only use inorganic nutrients
  - animal excrement, and compost is decomposed organic matter, usually from plants
  - by far the most important organic fertilizer
  - collected and stored in different forms
  - comprised of undigested food, digestive juices, and bacteria
  - easier to handle scraped up as a solid than as a sludge or liquid from a storage pond
  - fecal matter
* is fresh animal feces
  - fecal material
  - highly variable from animal to animal and it changes moment to moment over time
  - located in zoos
  - most valuable when it is returned to the soil
  - organics
  - perfect breeding medium for flies
  - rich in nutrients and is often used as a fertilizer
* is spread on cultivated land mainly as a way of disposing of farm animal waste
  - the fields because it very rich source of nutrients and organic matter
  - stacked or composted before being spread on pastures and hay land
* is the main waste product from the pig and poultry industries
  - major source of infection, often through contaminated soil and water
  - primary means through which parasites are spread
  - principal food of many insects in nature, especially larval flies
  - single largest soil amendment added to Wisconsin crops annually
  - usual supplier of nitrogen
  - unsanitary and breeds flies
* locally produced source of plant nutrients.
* major by-product of dairy farms and is useful as a nutrient source for crop production.
* mixture of solids and liquid.
* natural by-product of cattle production and natural fertilizer.
* potential contaminant of domestic wells.
* produced by fish in a polyculture pond immediately enter a detritus food chain.
* produces nitrous oxide and methane - both potent greenhouse gases.
* provides nutrition, and charcoal improves drainage.
* significant source of nutrients on many farms in the Northeast.
* slow-release fertilizer.
* spills and over-application of manure on land are sources of water pollution.
* spreading common method of adding organic matter to agricultural land.
* supplies part of the needed soil nutrients and provides added organic matter.
* undergoes anaerobic fermentation
  - digestive fermentation
* vary in nutrient content according to the animal source and what the animal has been eating
  - widely in their nutritional status
* washes into watersheds after heavy rainfall.