This document discusses different types of variable pay systems that farms can use to motivate and retain employees, including formal bonuses, informal bonuses, profit sharing, and employee stock ownership plans. It provides examples of how some California farms implement variable pay through formal seasonal bonuses, informal spot bonuses, profit sharing plans that distribute a percentage of profits to employees, and employee stock ownership plans. The document also discusses factors to consider when setting up a variable pay system and challenges that can arise if not implemented properly.