Which factor does NOT affect spray spacing in pesticide application?

Spray spacing in pesticide application is influenced by a variety of factors that directly impact how the pesticide is delivered and distributed across the target area. The height of the nozzles is significant because it affects the trajectory and dispersion pattern of the spray. Wind speed plays a critical role as well, since it can carry droplets away from the intended target, affecting effectiveness and leading to potential drift. The type of pesticide is important as different formulations and viscosities can change droplet size and distribution characteristics, which in turn affects how widely or narrowly the pesticide is applied.

In contrast, the size of the field does not inherently change the mechanics of spray spacing itself. While a larger field may require adjustments in terms of total application area coverage, the principles of nozzle height, wind effects, and specific pesticide characteristics remain constant regardless of the field's dimensions. Hence, the size of the field does not directly influence how the spray is spaced during application.