An independently controllable transmission mechanism includes a first planetary gear train, a second planetary gear train, a first transmission-connecting set and a second transmission-connecting set. The timing signal generating circuit delays the phase of a timing signal to be supplied to a relatively pre-stage latch circuit included in the latch circuits, from the phase of a timing signal to be supplied to a relatively latter stage latch circuit included in the latch circuits. a force inside andor on the surface of the granule that tends to cause the granule to break down or \u201cexplode\u201d when said granule contacts the soil, and specifically contacts the water or moisture of the soil, and in that said carbonate is preferably natural or precipitated calcium carbonate. Entries for different options within each one of the forms contain mutually different identifiers, identifiers in entries for equal options in different ones of the forms containing mutually different identifiers. As a result, it is possible to determine whether the probe is hybridized or unhybridized based on a change in the fluorescence intensity of the reporter molecule, the quencher molecule, or a combination thereof. A conventional retraction device is disadvantageous in that it is expensive, voluminous, difficult to install, thus requiring expert’s help to install, and difficult to repair at the time of breakdown, and requires expensive repairing costs.