A bit of air flow and vibrating perforated sheet metal packed in a steel frame doesn’t make a proper seed and grain cleaner.
Calculating effective screen area, determining appropriate screen diagrams, choosing adequate hole sizes or estimating crop specific bottlenecks is a science on its own. The theory behind seed and grain cleaning has never been published in such detail and compactness than in this present “Seed Cleaning Compendium” edition. It is the single release of the seed cleaning chapter of the “Handbuch Saatgutaufbereitung”, and the first time that this standard reference, based on the unique studies of Dr. Heiner Schwanz and Georg Pippel, is available in the English language. All contributing authors worked or are working for the PETKUS Group, a company that has been in the seed and grain processing business since 1852. They combine theory with practice on a high level. It is a helpful guide for practitioners, seed plant operators, seed technologists and students as well as for researchers.