They sell manure at the garden shop. And if you drive by many farms
at the right time, you can smell it.

You can always use your own manu

http://en.wikipedia.org/wiki/Humanure

Humanure
From Wikipedia, the free encyclopedia

"Humanure" is a neologism designating human waste (feces and urine)
that is recycled via composting for agricultural or other purposes. The
term was popularized by The Humanure Handbook, a 1994 book by Joseph
Jenkins that advocates the use of this organic soil amendment.

Humanure is not traditional sewage that has been processed by
waste-treatment facilities, which may include waste from industrial and
other sources; rather, it is the combination of feces and urine with
paper and additional carbon material (such as sawdust). By not
disposing of feces and urine through the typical use of a flush toilet,
nutrients can be returned to the soil instead of polluting the water
table.

Humanure is deemed safe for humans to use on crops as long as it has
been composted properly. This means that thermophilic decomposition of
the humanure must heat it sufficiently to remove or destroy harmful
pathogens, or enough time must have elapsed since fresh manure was
added that biological activity has killed most pathogens. To be safe
for crops, a curing stage is often needed to allow a second mesophilic
phase to reduce phytotoxins.

Humanure is different from night soil, which is raw human refuse spread
on crops.


http://en.wikipedia.org/wiki/Night_soil

Night soil
From Wikipedia, the free encyclopedia

Night soil is a euphemistic term for human feces in regards to waste
management, especially in developing nations or in areas that lack
adequate infrastructure to have a sewage system, running water or
septic disposal. In this policy of waste management, the human feces
stays in its solid form, and is excreted into a honey bucket, together
with urine and other waste. Often the deposition occurs within the
residence, such as in a shophouse faced with overpopulation or heavily
isolated rural areas.

The deposition is however generally temporary. In urban areas, usually
slums, a night soil collector will arrive regularly, at varying time
periods depending on the supply and demand for night soil collection.
Usually this occurred during the nighttime, giving the night soil its
name. In isolated rural areas such as in farms, the household will
usually dispose of the night soil themselves, but this practice is
generally not referred to as night soil, though the eventual fate of
the night soil, and style of handling, is similar.

Even particularly wealthy families in some parts of the world during
the 1800s were forced to use the practice of night soil because of the
lack of adequate infrastructure. The term is particularly known, or
even particularly infamous among the generations that were born in
various parts of China or Chinatowns (depending on the development of
the infrastructure) before 1960. Post-World War II Chinatown, Singapore
before the independence of Singapore heavily utilised night soil
collection as a primary means of waste disposal, especially as much of
the infrastructure was damaged and took a long time to rebuild
following the Battle of Singapore and subsequent Japanese Occupation of
Singapore. Following the subsequent development of the economy and the
standard of living after independence, the night soil system in
Singapore is now merely a curious anecdote of colonial rule, as well as
most parts of the People's Republic of China although still present in
some parts of it.

The collection method is generally very manual and heavily relies on
close human contact with the waste. During the Nationalist era when the
Kuomintang ruled mainland China, as well as Chinatown in Singapore, the
night soil collector usually arrived with spare and relatively empty
honey buckets to exchange for the full honey buckets. The method of
transporting the honey buckets from individual households to collection
centres was very similar to delivering water supplies by coolie, with
the exception that the item being transported was not at all potable
and it was being delivered from the household, rather than to the
household. The collector would hang the full honey buckets onto a pole
he carried on his back and then proceeded to carry it through the
streets until he reached the collection point. This was not
unreasonably an unpleasant occupation, and was often done by manual
labourers who had become used to the stench.

After arriving at a collection point, usually as a special treatment
centre within the city, or perhaps an open cesspit, methods on dealing
with the waste varies. The waste may go on being shipped to another
larger centre to be ultimately taken care of, or be disposed of at that
particularly juncture. Generally, the human waste is very attractive as
fertiliser and is used for this purpose because of the high demand for
fertilizer and the relative abundance of night soil. This is a highly
hazardous practice because of the human disease microbes in human
feces. Nevertheless, in developing nations it is a common practice.
Worm infections, such as Ascariasis in these countries are linked to
Night soil, since the larvae are in feces. There have also been cases
of disease-carrying tomatoes, lettuce, and other vegetables being
imported from undeveloped nations into more developed nations. However,
night soil does not necessarily need to be reused as fertiliser and may
be merely be disposed of and remain unused.

The safe reduction of human waste into compost is possible, but fairly
complex. Many municipalities create compost from the city sewage
system, but then recommend that it only be used on flower beds, not
vegetable gardens. Some claims have been made that this is dangerous or
inappropriate without the expensive removal of heavy metals.

India's ancient caste system assigned untouchables with the disposal of
night soil. This "manual scavenging" is now illegal in most Indian
states, although the practice undoubtedly continues in many rural
areas.

The proper disposal or recycling of sewage remains an important
research area that is also highly political