The Types of Organic Fertilizers

Organic fertilizers can be roughly classified into the following four categories:

• manure and urine: including human and animal excrement and manure, poultry manure, sea bird manure, and silkworm.
• Stacking manure: including compost, manure, straw and biogas fertilizer.
• Green manure: including cultivated green manure and wild green manure.
• Miscellaneous fertilizers: including peat and humic acid fertilizers, oil mites, soil fertilizers and sea fertilizers.