Abstract: Apparatus for orienting and sorting mushrooms includes an inclined plate along which the mushrooms move, a tunnel for erecting an air dam in the path of movement of the mushrooms to singulate the mushrooms, and a photoelectric mechanism for sorting the mushrooms according to size.

Abstract: A system for obtaining N slices of substantially uniform thickness from a solid to provide a batch having a desired weight, where N is an integer which may have a value between predefined limits. A partial batch weight is taken in response to weighing a number of slices less than N. A terminal value of N is estimated on the basis of the number of slices in the partial batch and the ratio of the desired batch weight and the partial batch weight. A predicted terminal deviation from the desired batch weight is calculated based on the partial batch weight and the ratio of the estimated value of N and the number of slices in the partial batch. In one embodiment the feed rate of the solid into a slicing device, and accordingly the slice thickness and terminal batch weight, is controlled as a function of the value of the predicted terminal deviation.