A second explanation (one that subsequent research seems to support) may be that the radically simplified soils in which chemically fertilized plants grow don’t supply all the raw ingredients needed to synthesize these compounds, leaving the plants more vulnerable to attack, as we know conventionally grown plants tend to be. NPK might be sufficient for plant growth yet still might not give a plant everything it needs to manufacture ascorbic acid or lycopene or resveratrol in quantity. As it happens, many of the polyphenols (and especially a subset called the flavonols) contribute to the
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