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(This is a reply to an April 2008 list email.)
For the heck of it, I gave this thing a try, following every step, but it
reports the conductivity of every soil type is 0.0 millimhos/cm! That
doesn't make sense, does it? Does the USDofA not support it anymore? Did I
use it wrong or miss a step?
Also, I'm confused about your conversion directly from millimhos/centimeter
to mS/m. Since a mho equals a Siemen (S), 1 millimho/cm should equal
100 mS/m ... shouldn't it?
Thanks,
Andy
----- Original Message -----
From: "Steve" <nu7t@gbis.com>
Sent: Monday, April 21, 2008 06:59 PM
> This e-mail posting is from the Radio Propagation Reflector that you're
> currently subscribed to. Refer to the end of this e-mail for directions
> on how to change your subscription options, or to unsubscribe.
> _______________________-start-_________________
>
> Fellow radiators:
>
> To Find Your Soil's Electric Conductivity
>
> 1) Go to: http://websoilsurvey.nrcs.usda.gov/app
>
> 2) Click on the big green button, "Start WSS".
>
> 3) Follow step 1 of "Three Basic Steps" on the first page.
>
> Typing your address under "Quick Navigation" is the
>
> easiest method. Remember to spell out street, circle...
>
> When using the + and - zoom feature, click on + or -.
>
> Then place the cursor at the point you wish to be the
>
> center of your next map and click.
>
> 4) Click on "view".
>
> 5) Click AOI tab which is just above the map and outline
>
> (draw a box
>
> around) your Fresnel Zone.
>
> 6) Follow the second step "View/Explore" by clicking
>
> the "Soil Map" tab.
>
> 7) Click the "Soil Data Explorer" tab.
>
> 8) Click the "Soil Properties and Qualities" box which is
>
> just above the map.
>
> 9) Click the "Soil Chemical Properties" box.
>
> 10) Click the "Electrical Conductivity" box.
>
> 11) Toward the bottom of the page, locate "Top Depth" and
>
> enter 1.
>
> For the bottom depth enter 144 for 14 Mhz, 360 for 1.8 Mhz.
>
> 12) Click inches.
>
> 13) Click "View Rating".
>
> 14) In the table, read in the column "Rating (millimhos
>
> per centimeter)".
>
> 15) Use the millimhos/centimeter number as mS/m.
>
> Thus, 17 millimhos becomes 17 mS/m. This is the
>
> electrical conductivity of your Fresnel Zone.
>
> 16) This page is printable from your screen to your printer.
>
> Steve, NU7T
> _______________________________________________
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