Why must separate calibration tables be made for differently sized pellets and granules?

The necessity for separate calibration tables for differently sized pellets and granules is rooted in the fact that spreader output varies with particle size. When using a spreader to apply herbicides or other materials, the size of the particles can significantly influence how they flow through the equipment and how evenly they are distributed across a given area.

Larger particles tend to flow differently than smaller ones, often leading to uneven application rates if the same settings are used for both. For example, smaller granules may require different settings to achieve an even spread compared to larger pellets due to differences in weight and density. Therefore, to ensure proper coverage and efficacy of the herbicide being applied, separate calibration tables must be established. This calibration promotes efficient and effective application rates tailored to the specific characteristics of each particle size.