RE: [CH] Superscript usage in "Peppers: Vegetable and Spice Capsicums"

T. Matthew Evans (matt.evans@ce.gatech.edu)
Fri, 25 Apr 2003 10:49:24 -0400 

Greg --

You are right about the usage -- the "-1" simply means inverse, or one over
the unit in question.  The last statement appears to refer to radiative flux
(often measured in Langleys) except that "mol" is a numerical quantity (an
Avogadro's number of material atoms or molecules).  Your text would read
"125 micromoles per square meter per second" -- i.e., 125 micromoles of some
substance is being applied to each square meter every second for 20 hours.
Hope this helps.

Matt

------------
T. Matthew Evans
Geosystems Group, School of CEE
Georgia Institute of Technology
URL:  www.prism.gatech.edu/~gte964w
------------


-----Original Message-----
From: owner-chile-heads@globalgarden.com
[mailto:owner-chile-heads@globalgarden.com]On Behalf Of Greg Mortensen
Sent: Friday, April 25, 2003 10:18 AM
To: chile-heads@globalgarden.com
Subject: [CH] Superscript usage in "Peppers: Vegetable and Spice
Capsicums"


Chile-Heads:

  I just picked up a copy of Paul Bosland's "Peppers: Vegetable and Spice
Capsicums", and I have a question about superscript usage.  I'm certain
that it has something to do with this book being published in the UK. (I'm
in the USA.)

  On page 61, it states "A solution of 2 g l-1 of potassium nitrate was
successful in eliminating dormancy of C. annuum seeds."  I'm a bit unclear
what the superscript "-1" is.  I read that line as "2 grams per liter"; is
that right?

  On page 127, it states "The typical volume of rockwool currently used is
about 1.4 l m-2 of greenhouse area."  I read that as "1.4 liters per
squared meter."

  Lastly, on page 129 we have "Supplementary lighting of 125 umol m-2 s-1
for 20h was only marginally better than the same intensity for 16 h."  I'm
not even going to touch that one.

  Perhaps some Briton can explain this superscript usage (especially the
whole "-" thing); I tried asking one[1] here at work, but he was only
able to tell me that "ladybugs are called ladybirds" (page 130).

  Regards,
    Greg

[1] He also said "Greg, what's the difference?  You're just growing these
things in a windowbox anyway!"

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