Abstract: Cultivation cell for seedlings and a tray formed from such cells, comprising apertures breaking the cell upper rims. Thereby growth disturbancies in roots growing close to the substrate surface are prevented. The tray comprises air channels, and growth of surface roots across the upper apertures from one cell to another is prevented by structural elements giving the tray rigidity.

Abstract: A method and device for improving the efficiency of mechanical transplanting, wherein seedling balls carrying no seedlings or undersize seedlings are automatically removed prior to the planting stage. Several seedling balls are simultaneously extracted from a common cultivation tray and deficient balls are detected and removed. The deficit caused by a removed seedling ball is compensated by momentarily increasing the rate of feeding balls from the tray. No separate replacement seedling supply is required.

Abstract: A method and device for improving mechanical transplanting of balled seedlings involves detection of balls with deficient seedlings, such as those with no seedlings or undersized seedlings, with a sensor through an aperture in a compartment holding the ball. Deficient balls are allowed to exit from the compartment through a shutter, and replacement balls are provided from a seedling supply. The replacement seedling supply includes a cassette having one row of cells for seedlings and the cassette is advanced, as necessary, by a geared shaft engaging the side of the cassette. Alternatively, replacement seedlings are provided from a cultivating tray.