Excerpt from the report Preface: This report is based on research conducted at the Red River Valley Potato Research Center, East Grand Forks, Minn. The study is part of a marketing research project to develop more efficient work methods, equipment, and facilities for the off-farm handling, storage, and preparation for market of fall-crop potatoes. The report covers ventilation systems for providing optimum storage conditions for potatoes, and presents guides for the design, selection of equipment, and operation of shell ventilation systems. Improved efficiency in marketing farm products is the objective of a broad program of marketing research by the Agricultural Marketing Service, and this study is part of that program.