Several decades ago, it began the idea of applying fertilizers through irrigation system. During the recent years, the application of chemicals through drip irrigation was adopted. Thus, new technical terms were defined such as: Chemigation, chloration, pestigation, insectigation, fungigation, nemagation, and herbigation [3, 11, 16]. The term chemigation was adopted to include the application of chemicals through the irrigation systems. The chemigation offers following economic advantages compared to other conventional methods :
1. Provides uniformity in the application of chemicals allowing the distribution of these in small quantities during the growing season when and where these are needed.