Two kinds of fertilizers onw is organic that are created using natural products such as manure, compost, litter etc. These are created using organic materials and are more benfecial to plants as they do not cause harm in the long run.

Inorganic or synthetic fertilizer that use inorgamic compounds or chemicals in order to provide the nutrition required for grass.

Manure has nutrients from natural sources, very complex, less toxic, do not cause side effects.

Fertilizer has nutrition from artificial sources, simple salts, cause side effects.