THE MARIJUANA GROWER'S GUIDE..........by Mel Frank & Ed ...

Strains also differ in which cannabinoids they produce. Based on which cannabinoids, Cannabis strains can be divided into five broad chemical groups.((Chemical classification based on work by Small et al (51))) The general trend is for plants to have either THC or CBD as the main cannabinoid. Type I . Strains are high in THC and low in CBD. ................
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