Rhizosphere is the region where

Which of the following is the correct order of mineral elements based on their proportion in the structure of teeth and bones?

Factors which determine to a large extent the vegetation of any area are:
$I.$ $pH$ of soil
$II.$ Mineral composition of the soil
$III.$ Water holding capacity of soil
$IV.$ Weather condition
Choose the correct option.

In hydroponics,a chelating agent is used to

In vertebrate animals,what fraction of the total phosphorus is incorporated into teeth and bones (in $\%$)?

The transfer of minerals from top soil to sub soil through soil water is called