Fertilizers are compounds that help plants grow. Many types and brands of fertilizers are available on the market, which can be divided into inorganic fertilizers and organic fertilizers according to composition. Fertilizers are usually applied directly to the soil or sprayed on the leaves.

Organic fertilizers (manure) Natural organic matter by microbial decomposition or fermentation of a class of fertilizers. China also known as peasant fertilizer.

Its characteristics are: wide sources of raw materials, a large number; nutrient content, low content; fertilizer effect is long and later, to be decomposed and transformed by the microorganisms can be absorbed by plants; Commonly used varieties of natural fertilizer green manure, human waste, manure, composting, fertilizer, biogas fertilizer and waste fertilizer.

The production of organic fertilizer a lot of raw materials, can be divided into the following categories:

1, agricultural waste: such as straw, soybean meal, cottonseed meal and so on.

2, livestock and poultry manure: such as chicken manure, cattle and sheep horse manure, rabbit manure;

3, industrial waste: such as distiller's grains, vinegar residue, cassava residue, sugar residue, furfural residue;

4, household waste: such as food waste;

5, urban sludge: such as river silt, sewer silt.