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<p>present according to size. Significant energy is usually required to disintegrate soil, etc. particles into the PSD that is then called a <b>grain size distribution</b>.</p>

<p><big>Significance</big></p>
<p>The PSD of a material can be important in understanding its physical and chemical properties. It affects the strength and load-bearing properties of rocks and soils. It affects the reactivity of solids participating in chemical reactions, and needs to be tightly controlled in many industrial products such as the manufacture of printer <a href="page.php?w=toner_%28printing%29">toner</a>,</p><p>
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