Mineralisation is performed by

The slow rate of decomposition of fallen logs in nature is due to their

Which of the following statements is correct regarding Humus?
$(P)$ It is colloidal in nature.
$(Q)$ It is rich in nutrients.
$(R)$ It is highly resistant to microbial decomposition.

The rate of decomposition is $........$ in anaerobic and low-moisture conditions,and $........$ in warm and moist conditions,respectively.

The major site of decomposition in soil and water bodies,respectively,is:

The cycling of nutrients in an ecosystem will stop if which of the following are removed?