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<p>of specific root exudates over time can create negative feedback loops for the host plant. In aged tea plantations, the buildup of plant polyphenols in the soil has been directly linked to a detrimental shift in soil microbial communities, contributing to the decline in soil health and productivity known as soil sickness.</p>

<p><big> Allelochemicals </big></p>
<p>Although it goes beyond the rhizosphere area, it is notable that some plants secrete <a href="page.php?w=Allelopathy">allelochemicals</a> from their roots, which inhibits the growth of other</p><p>
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