Occurrence of Earthworm in soil is indicated by

Occurrence of water blooms in a lake indicates

Frequent occurrence of water blooms in a lake indicates which of the following ?

The properties of a soil is indicated by its

The presence of earthworm in the garden soil can be traced out by

The presence of earthworm in the garden soil can be traced out by

Who conducted studies on role of earthworms in soil fertility? a.Mendel b.Miller c.Urey d.Darwin

Some bio-indicator plant have evolved metal tolerance, and can indicate the occurrence of specific indicator of lead is