What type of formulation would make it easier to apply an herbicide by mixing it with water?

The most suitable formulation for mixing an herbicide with water is a solution. Solutions are uniform mixtures where the active ingredient is completely dissolved in the solvent, allowing for easy application. This means that when an herbicide is formulated as a solution, it remains in a liquid state and can be mixed with water without forming separate layers or particles.

This property is crucial in ensuring that the active ingredient is effectively distributed when applied, making the application process more efficient and ensuring uniform coverage on target areas. In contrast, emulsions involve mixing two immiscible liquids, typically oil and water, while dispersions contain larger particles that can settle out over time, both of which can complicate mixing and application. Formulations generally refer to any product designed for pesticide use but do not specify the type of mixing behavior with water. Thus, the solution formulation specifically defines the ease of mixing with water, which makes it the most appropriate choice.