What does the agitation system prevent during herbicide application?

The agitation system is designed to keep the herbicide mixture uniformly mixed while it is in the tank, which is crucial for effective application. By preventing the separation of active ingredients from water, the agitation system ensures that the concentration of herbicide remains consistent throughout the application process. If the active ingredients were to settle out or separate, it would lead to uneven dosages being applied, diminishing the effectiveness of the treatment and potentially resulting in poor control of the target pests.

The other options do touch on important aspects of maintenance during herbicide application, but they do not directly relate to the primary function of the agitation system. For example, while an over-saturation of granules in the tank can cause issues, it isn't a primary function of the agitation system to address that. Similarly, managing lower pressure in spray systems or preventing clogging of nozzle openings are important for maintaining equipment performance, but these issues are typically managed through different means, such as equipment design and maintenance rather than the direct function of an agitation system. Hence, maintaining a homogeneous mixture is the vital aspect of what the agitation system accomplishes.