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View Diary: Open thread for night owls: Excerpts from the Harper's Index (119 comments)

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  •  not to have any sort of direct knowledge on this (5+ / 0-)

    but it was my understanding that continuous sunlight leads to chemical changes within the plant, thereby enhancing certain "properties" of the plant.

    For example, tobacco companies in the 1950s shifted tobacco production to South and Central America and found the nicotine content of the leaf was enhanced due to longer days and changes in soil composition while American leaf was relegated to the role of "mixer" or "blender"  leaf to make a smoke "smoother" or more "level"  

    •  This is intriguing (0+ / 0-)
      tobacco companies in the 1950s shifted tobacco production to South and Central America and found the nicotine content of the leaf was enhanced due to longer days
      They have longer days in south and central America?  Wow!!
      •  not so much longer days but longer seasons (1+ / 0-)
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        Roadbed Guy

        sorry I was not more specific but in the US it is one crop per year while there are two in more tropical countries.  Also there is some qualitative difference in the sunlight available there

        •  OK, that makes sense (0+ / 0-)

          although as far as sunlight goes, one might think that the one crop per year in the US would actually get more of that considering that there are more hours of sunlight in the summer the farther you go from the equator . . .

          •  it has been years since the guys I knew died (1+ / 0-)
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            KenBee

            but the angle of the sun is also important; for example,  the sun is actually closer to the earth in the winter which is the opposite of what "conventional wisdom" would expect

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