Soil thermometers have long stems that are immersed into soil to measure temperatures. Compost thermometers typically have threads used for mounting to permanent or semipermanent locations like compost bins. Soil thermometers typically have a plain bushing and are intended for both long- and short-term immersion in soil. These agricultural thermometers have a shaded and labeled zone on the dial that highlights if the soil or compost bin is hot, cold, or an ideal temperature.