Abstract: A stationary grid of crossed blade members is provided and force structure is movable toward and away from one side of the grid and operative to engage a farm commodity such as an onion and gradually move the onion toward the grid. Knife structure is supported relative to the grid for repeating movement in a plane generally paralleling and slightly spaced outward of the other side of the grid and across the latter. Drive structure is operatively connected to the knife structure for repeated movement of the latter across the grid at a speed proportional to the speed of movement of the force structure toward the grid. The force structure includes a plate paralleling the grid and spaced outwardly of the aforementioned one side thereof. The plate includes a plurality of blunted pins projecting outward therefrom toward the grid and projectable into the spaces defined between adjacent portions of the crossed blade members of the grid.