Seed conditioning is the final process that establishes the quality of a seed lot and determines its value. Performance of seed conditioning depends entirely on how effectively the operator sets up and adjusts each machine. This book focuses on teaching the operator details of each machine, how to get maximum performance from it, in terms of operating efficiency, maximum removal of undesirable particles, and minimum loss of good seed. The manual is organized in a manner which focuses on the specific machine models installed in each operator's specific plant. It is set up to be used as text material in training classes or as a guide for operators employed by seed companies.