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<p><a href="page.php?w=water_cycle">water cycle</a>, <a href="page.php?w=phosphorus_cycle">phosphorus cycle</a>, <a href="page.php?w=oxygen_cycle">oxygen cycle</a>, among others that continually recycle along with other mineral nutrients into <a href="page.php?w=Productivity_%28ecology%29">productive</a> ecological nutrition.</p>

<p><big>Overview</big></p>
<p>The nutrient cycle is nature's recycling system. All forms of recycling have feedback loops that use energy in the process of putting material resources back into use. Recycling in ecology is regulated</p><p>
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