Which is not a type of dry formulation?

A solution is not considered a type of dry formulation because it consists of a solute dissolved in a solvent, resulting in a liquid form. In contrast, the other options—wettable powders, granules, and soluble powders—are all categorized as dry formulations. Wettable powders are finely ground particles that can be mixed with water to form a suspension, while granules are larger particles that can dissolve or disperse in water. Soluble powders, as the name implies, can dissolve in water to form a solution, but they remain in a dry form until mixed with a liquid. The distinction lies in the physical state; dry formulations do not contain a liquid component until they are mixed, whereas a solution inherently involves a liquid state. Understanding this differentiation is crucial for comprehending how various agricultural chemicals and products are formulated and applied.