Organic fertilizer differ from chemicals fertilizer

Soils with lots of organic matter remain loose and airy, hold more moisture and nutrients, foster growth of soil organisms, and promote healthier plant root development. If only chemicals are added the soil gradually loses its organic matter and microbiotic activity. As organic matter is used up, the soil structure deteriorates, becoming compact, lifeless and less able to hold water and nutrients.

Chemical fertilizer

This results in increased amounts of chemical fertilizers needed to feed plants. We also like organic fertilizers because they're made from renewable resources; chemicals are not.