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<DIV>Re control of invasives among harvestable medicines:</DIV>
<DIV>In a cultivated environment, no-till and mulch or a green cover crop would probably work in some form for any selected crop, there may be many examples of it already in practice in the field? Below I've forwarded a posting from another list, it's about rice production, but the principle is the same. Jennifer Chesworth</DIV></BODY></HTML>