Why are agricultural plants fertilized?

Fertilizing plants is not always a necessary process. It is needed only when the plants lack mineral and organic things in the ground. Moreover, it is more correct to say not “fertilize plants”, but “fertilize the earth.” Since plants take everything from the ground themselves. Fertilizing the soil can be done with organic waste such as leaves, humus, etc. On an industrial scale, concentrates can be used, both chemical and organic. Both those and others do not harm either the earth, or plants, or animals, or humans, but subject to the correct use of substances.