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    Button, button, who's got the button?
    Commerce, Religion, Drug Regulation and Conservation
    in the Current Peyote Trade of the Texas Borderlands.

    The Problem of Diminishing Returns

    The results of harvesting too frequently:


         (1) Average size of harvested buttons decreases, which results in consumption of greater numbers of buttons to achieve the desired psychic effect. (Vicious circle.)

         (2) Seed production of plant population decreases, so that harvested plants are not sufficiently replaced by seedlings.

         (3) Some harvested plants never grow back. (Harvest-related mortality.)



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