Question

How are minerals replenished in the soil using biological waste?

Answer 1

When a Living Being dies, it becomes a biological waste for the environment. The Body of a Dead Animal contains a lot of Minerals which can be decomposed and transferred into the soil. In short, when the Biological waste is decomposed by the Microorganisms in the soil, The Minerals in it are absorbed by the Soil.
Thus, Minerals are replenished in the soil.
Furthermore, There are many Cycles that are operating in the Nature that ensures that the soil is replenished with the Minerals like Nitrogen, Sulphur and Carbon Cycle.

Answer 2

For new crops and saplings to grow in the soil where already plants have grown, it needs the nutrients in the soil. So, it is important to replenish the minerals in the soil from time to time.

The best way to replenish the soil is to add the needed fertilizers and manure which add the minerals to the soil. 

Also, the manure made by decomposition of household wastes, rotten plants and crops, animal dung, and other agricultural wastes can be added to the soil which helps in replenishing the minerals.