nikotin

are all these subtypes of the same variety? They seem to be used interchangeabley. What's the difference?

This is something we've discussed before, but today a friend with more than 40 years in the tobacco industry explained it pretty good. Nicotine is created in the roots and migrates up into the leaves. If you have a small root ball, you get low nicotine. If you starve a plant for water, it...