What type of pesticide application procedure involves the uniform application of a pesticide to an entire area or field?

Broadcast application is a method where pesticides are uniformly distributed over an entire area or field. This technique is particularly useful for managing pests or weeds in large areas, as it ensures that the entire surface receives an even coverage. It enables effective control of pests that may be widespread across a landscape rather than concentrated in specific spots.

In contrast, the other methods focus on targeted applications. Spray application typically refers to a more general process but doesn't inherently convey the idea of treating the entire area. Spot application is used for localized treatment of specific areas where problems are identified, while directed application targets specific plants or locations rather than covering a large field uniformly. Thus, broadcast application is the correct choice as it accurately describes the method of applying pesticides across an entire area or field uniformly.