Re: NANFA-L-- plants and soil

Subject: Re: NANFA-L-- plants and soil
From: Irate Mormon (archimedes at
Date: Thu Sep 30 2004 - 20:48:00 CDT

Quoting Todd Crail <farmertodd at>:

> PAR = Photosynthetically Available Radiation. It's a measure of how much
> energy is in the spectrum where plants can utilize it for photosynthesis.
> It's measured in some gosh awful conglomeration of units. It's basically a
> bunch of physics crap that biologists can find useful from time to time by
> lowering it or increasing it and playing with the plasticity of organisms
> using it, as an example. But it looks really impressive when you put all
> those units next to a graph ;)

OK, gotcha. Industrial terminology vs. biometric terminology. I unnerstan's.

Typically, one only finds spotlights or floodlights with a PAR or BR (bulged
reflector) designation, so I was understandably confused about a fluorescent
tube being designated as a "parabolic reflector" !

Where the wind shifts the flower
Where the wind sifts the flour
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: Fri Dec 31 2004 - 11:27:24 CST