Because of the complimentary ion effect, potassium is more readily leached from an acid soil than from a neutral soil.

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The complimentary ion effect involves the competition between cations for binding sites on soil particles. In an acid soil, there is an abundance of H+ ions which can compete with K+ for binding sites, leading to increased leaching of potassium. In a neutral soil, there are fewer H+ ions, and thus less competition for binding sites. Therefore, potassium is more readily leached from an acid soil than from a neutral soil.

Because of the Complimentary Ion Effect, Potassium Is More Readily