The sheet processing apparatus is provided with: an apparatus main body that performs processing for a sheet; a sheet stacker on which a sheet transported from the apparatus main body is stacked in a first state where the sheet stacker is inclined with respect to a horizontal plane, and that is downwardly movable; and a moving-down unit that moves the sheet stacker down. The coulter wheel assemblies may be laterally adjustable and may be mounted to the cultivator frame using a mounting means that permits rotation about a vertical axis. An opening extends lengthwise along the body and is sized for receiving an elongated member. The method and device can also derive the gain as a function of the rate of change of output signal with an operational parameter such as voltage or temperature. 7 cm in diameter; attractive soft pink ray and bright yellow disc florets; very freely flowering habit with numerous inflorescences per stem; response time about 67 days; dark green foliage; strong stems; long peduncles; and good postproduction longevity with inflorescences maintaining good substance and color for at least four weeks in an interior environment. The cover at the rearward end of the power unit further includes apertures therein for receiving the bottom of the bridge.