Subject: Re: NANFA-L-- plants and soil
From: Todd Crail (farmertodd at buckeye-express.com)
Date: Thu Sep 30 2004 - 19:03:35 CDT
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 ;)
----- Original Message -----
From: "Irate Mormon" <archimedes at bayspringstel.net>
>> The "R" in PAR of the lamps may be degrading it out of the wood faster
>> than
>> normal too.
>
> Huh? I'm confused. PAR is used to describe the shape of a bulb, as in
> PARabolic. The number following the PAR is the diameter of the bulb in
> 1/8ths
> of an inch.
>
> What "R" are you talking about?
/-----------------------------------------------------------------------
/ This is the discussion list of the North American Native Fishes
/ Association (NANFA). Comments made on this list do not necessarily
/ reflect the beliefs or goals of NANFA. For more information about NANFA,
/ visit http://www.nanfa.org . Please make sure all posts to nanfa-l are
/ consistent with the guidelines as per
/ http://www.nanfa.org/archive/nanfa/guidelines.html. To subscribe,
/ unsubscribe, or get help, visit the NANFA email list home page and
/ archive at http://www.nanfa.org/archive/nanfa/.
: Fri Dec 31 2004 - 11:27:24 CST