Have you ever puzzled why only your plants lack luxuriance, why there are so few blooms and they nearly never blossom, and why your fruits lack flesh and juice?

Your efforts weren't ineffective; you merely overlooked an essential component:

Because composting entails more than simply piling up organic matter to be later applied to plants,

In actuality, plants eat up all the nutrients in the soil each year.

Your soil eventually has the same nutrients that you can find in a desert. It's zero, then.