What type of agitation is provided by the return flow from the pump?

Hydraulic agitation refers to the process of mixing or stirring liquid through the movement of fluid, typically achieved by the return flow from a pump. In the context of pesticide application, when the pump circulates the mixture, it creates agitation that ensures the pesticide is evenly distributed in the spray tank. This method utilizes the physical properties of the liquid being pumped to create flow and turbulence, which helps to keep the mixture homogeneous and prevents settling of any solids or clumping.

Mechanical agitation, while related, generally involves external mechanical devices, such as paddles or stirrers, to mix substances. Dynamic agitation often refers to systems where movement causes mixing but may not specifically involve fluid movement as in hydraulic agitation. Centrifugal agitation would imply the use of centrifugal force, which is different from the flow dynamics generated by a pump.

Therefore, hydraulic agitation is the most accurate description of how the return flow from the pump contributes to mixing the pesticide solution effectively.