The mulch also helps keep the temperature fairly constant so that activity of the micro-organisms can occur at a uniform rate.
(The mulch; helps; keep the temperature fairly constant so that activity of the micro-organisms can occur at a uniform rate) (activity of the micro-organisms; can occur; )
The mulch activity of the micro-organisms
helps can occur
keep the temperature fairly constant so that activity of the micro-organisms can occur at a uniform rate