The $pH$ of a fertile soil is usually around

The group of minerals found in teeth and bones is ........

The best soil for healthy and vigorous growth of the plant is

The possible resource of phosphorus ions and nitrogen ions in soil generally get depleted because they are usually found as

Any mineral ion concentration in tissues that reduces the dry weight of tissues by $10$ percent is considered toxic.

What is the optimal $pH$ range for the growth of most plants?