What term is used to refer to the quantity of herbicide when expressed in its acid form?

The term used to refer to the quantity of herbicide when expressed in its acid form is Acid Equivalent (ae). This measurement is significant because it quantifies the amount of the active ingredient in its most potent form, which is crucial for understanding the herbicide's effectiveness and the appropriate application rates.

When discussing herbicides, the acid form is often the active component that directly affects the target weeds. The Acid Equivalent provides a standardized way of expressing this quantity, making it easier for users to compare different formulations and products. This is important for compliance with regulations and for making informed decisions about how much product to apply to achieve desired weed control.

On the other hand, Active Ingredient (ai) refers to the total quantity of the herbicide's active compounds, which may include various derivatives or formulations that are not necessarily in their acid form. Adjuvants are substances added to enhance the performance of the herbicide but are not themselves herbicides, while adsorption refers to the process by which substances adhere to surfaces, which is a different concept altogether. Understanding these terms is essential for effective weed management in turf and ornamental settings.