Why are anionic nutrients generally mobile in soils, and thus easily leached, while cationic nutrients are relatively immobile?

Question

Quizplus · Accepted Answer

Cationic nutrients are attracted to negative charges on clay particles and organic matter in the soil, so they are less likely to be leached away. Anionic nutrients, on the other hand, are negatively charged and therefore not held strongly by soil particles, making them more likely to move through the soil and be leached away.

Why Are Anionic Nutrients Generally Mobile in Soils, and Thus