What are the raw materials for the production of organic fertilizers?

There are many raw materials for the production of organic fertilizers, which can be specifically divided into the following categories:

1. Agricultural waste: such as straw, soybean meal, cotton meal, etc.

2. Livestock and poultry manure: such as chicken manure, cow, sheep, horse manure, rabbit manure;

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

4. Household waste: such as kitchen waste, etc;

5. Urban sludge: such as river silt, sewer silt, etc.