For which method is the duration of usable compost generation 3 to 6 months?

Pit composting takes about 3 to 6 months to yield usable compost as organic matter decays in a dug pit.

Vermicomposting with earthworms is faster, giving compost in roughly two to three months.

A semi-automatic waste converter shortens the cycle to a few weeks.

An automatic waste converter can produce compost within about a day.

The pit method is slow because it relies on natural microbial decay without mechanical aid.

Turning the pit and keeping it moist speed up aerobic decomposition.