-----Original Message-----
From: sanet-mg-digest <owner-sanet-mg-digest@ces.ncsu.edu>
To: sanet-mg-digest@ces.ncsu.edu <sanet-mg-digest@ces.ncsu.edu>
Date: Monday, January 17, 2000 1:46 AM
Subject: sanet-mg-digest V1 #1540
>
>sanet-mg-digest Sunday, January 16 2000 Volume 01 : Number 1540
>
>
>
>In this issue:
>
> Re: Rubber car tires, soaker hoses and heavy metals
> Gravity drip
> Re: Gravity drip
> Corporate Trustworthiness was Re: Rubber car tires, soaker hoses and
heavy metals
> Re: Gravity drip -minor correction
> Correction of minor correction }:
>
>See the end of the digest for information about sanet-mg-digest.
>
>----------------------------------------------------------------------
>
>Date: Sat, 15 Jan 2000 19:23:50 -0600
>From: Guillermo Romero <romerog@Prodigy.Net.mx>
>Subject: Re: Rubber car tires, soaker hoses and heavy metals
>
>HLPizza@aol.com wrote:
>
>>I asked a chemist today about the poly coating and he said it's coated for
>>good. But then again I have no idea how long his forever is.
>
>Yes, recently I have the notion that the scare about using old tires was
probably an exageration, that is why I choose to ask directly the
manufactures. I found some info today with emission tests done by U
Michigan where they did not detect Cd leakage in shreded tires and by the
USDA-EPA claiming that the Cd emission is probably not much of a problem,
since Cd competes with Zn in the plant absortion process. Zn could be also
tire related but because is part of the steel belt, not the rubber, soaker
hoses seem to be Ok.
>
>
>In any case I am glad I asked; I really find them the best way to irrigate
beds in arid areas, drip does not come close since you can bury the soakers
and not the drip tape. Once buried, the soil on top acts as a dry mulch and
the relative lack of humidity there stops weeds from proliferating (I use
straw mulches as well Ok). Also, the uniform humidity allows for intensive
planting and with the irrigation tapes you are limited by the spacing of the
drip holes.
>
>Thanks and regards
>
>Guillermo Romero Ibarrola
>Comala, Colima, MEXICO
><romerog@Prodigy.Net.mx>
>
>
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with the command
>"unsubscribe sanet-mg". If you receive the digest format, use the command
>"unsubscribe sanet-mg-digest".
>To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
>"subscribe sanet-mg-digest".
>
>All messages to sanet-mg are archived at:
>http://www.sare.org/htdocs/hypermail
>
>------------------------------
>
>Date: Sun, 16 Jan 2000 01:21:09 EST
>From: Kfc110259@aol.com
>Subject: Gravity drip
>
>Several months ago someone was talking about gravity fed drip tape, coming
>from plastic 55 gallon drums. They said one company had the fittings cheap
>and another had the tape cheap. If whoever wrote that or remembers the
>companies I would appreciate it. Any other info on gravity feed tape lines
>would be appreciated. Thank you.
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with the command
>"unsubscribe sanet-mg". If you receive the digest format, use the command
>"unsubscribe sanet-mg-digest".
>To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
>"subscribe sanet-mg-digest".
>
>All messages to sanet-mg are archived at:
>http://www.sare.org/htdocs/hypermail
>
>------------------------------
>
>Date: Sun, 16 Jan 2000 15:52:06
>From: "Bluestem Associates" <bluestem@webserf.net>
>Subject: Re: Gravity drip
>
>On Sun, 16 Jan 2000 01:21:09 EST, Kfc110259@aol.com wrote:
>
>>Several months ago someone was talking about gravity fed drip tape, coming
>>from plastic 55 gallon drums. They said one company had the fittings cheap
>>and another had the tape cheap. If whoever wrote that or remembers the
>>companies I would appreciate it. Any other info on gravity feed tape lines
>>would be appreciated. Thank you.
>
>I wouldn't mess around with the system unless you have quite a bit of
>height diffrential (hydraulic head) to work with. For the most part
>drip systems require at least 15 psi (1000 kPa) pressure to work well.
>With gravity-fed systems you need about 2 feet of head per psi, or at
>least 30 feet drop between the barrel and the beginning of the tape.
>You should also allow for reduction in pressure from "pipe friction."
>
>On the whole, gravity systems for drip tape will be disappointing
>unless you have at least 40 feet (50 is better) of head to work with.
>
>Another potential problem is that some iron from any metal barrel will
>leach into the water, nourishing certain classes of bacteria that can
>plug your tapes within a month in warm weather.
>
>Bart
>
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with the command
>"unsubscribe sanet-mg". If you receive the digest format, use the command
>"unsubscribe sanet-mg-digest".
>To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
>"subscribe sanet-mg-digest".
>
>All messages to sanet-mg are archived at:
>http://www.sare.org/htdocs/hypermail
>
>------------------------------
>
>Date: Sun, 16 Jan 2000 12:27:34 -0600
>From: mmiller@pcsia.com
>Subject: Corporate Trustworthiness was Re: Rubber car tires, soaker hoses
and heavy metals
>
>snip ...I have the notion that the scare about using old tires was probably
>an exageration, that is why I choose to ask directly the manufactures.
>...snip
>
>Why on earth would you trust what the manufacturer has to say about their
>product's safety? After all, the manufacturer has a vested interest in
>Seeing, Hearing and Speaking no evil of a money making product.
>
>Remember, it was the tobacco companies telling us cigarette don't cause
>cancer and the electric power and oil companies telling us "No, there is no
>global warming". Ronald Regan even told us tree were the source of NOx
>pollution. Right, sure and now the National Reaseach Council come out with
>their report., "Oh, sorry world, we just fibbed a little, so uh um, yea
>there is a little global warming."
>
>I guess it is kind of poetic justice that now that when a corporation makes
>a statement no one will believe them even if it were true. Their
>credibility is shot, zero zip, nada. Sort of a reverse on the little boy
>who cried wolf story. We started down this Road of Doublespeak 20 or more
>years ago and now people not only don't believe Ralph Nader, they don't
>believe GM or other corporations either. Now with the expose about
>corporate lawyer hiring on at the FDA to oversee the approval of the
>products they worked on in the private sector, the government has fallen
>into the same credibility morass as their corporate handlers.
>
>Like the old saying, "What goes around comes around." and we are all worse
>off for this too. Mike Miller
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with the command
>"unsubscribe sanet-mg". If you receive the digest format, use the command
>"unsubscribe sanet-mg-digest".
>To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
>"subscribe sanet-mg-digest".
>
>All messages to sanet-mg are archived at:
>http://www.sare.org/htdocs/hypermail
>
>------------------------------
>
>Date: Sun, 16 Jan 2000 19:23:31
>From: "Bluestem Associates" <bluestem@webserf.net>
>Subject: Re: Gravity drip -minor correction
>
>>drip systems require at least 15 psi (1000 kPa) pressure to work well.
>
>Sorry, that's 1000 Pascals, or *1* kPa. Fingers faster than brain this
>morning.
>
>
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with the command
>"unsubscribe sanet-mg". If you receive the digest format, use the command
>"unsubscribe sanet-mg-digest".
>To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
>"subscribe sanet-mg-digest".
>
>All messages to sanet-mg are archived at:
>http://www.sare.org/htdocs/hypermail
>
>------------------------------
>
>Date: Sun, 16 Jan 2000 19:34:47
>From: "Bluestem Associates" <bluestem@webserf.net>
>Subject: Correction of minor correction }:
>
>On Sun, 16 Jan 2000 19:23:31, Bluestem Associates wrote:
>
>>>drip systems require at least 15 psi (1000 kPa) pressure to work well.
>>
>>Sorry, that's 1000 Pascals, or *1* kPa. Fingers faster than brain this
>>morning.
>
>These metric units are aggravation in a jar ... it's supposed to be 100
>kPa = 15 psi, and every metric-fluent member of the list is entitled to
>a good laugh at my expense, because I lived for 15 years with metric
>measures and *still* stumble around like this.
>
>Non-metrics can cluck disapprovingly. After all, if God had meant for
>us to go metric, we'd have been created with 10 fingers.
>
>
>Red-faced ... Bart
>
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with the command
>"unsubscribe sanet-mg". If you receive the digest format, use the command
>"unsubscribe sanet-mg-digest".
>To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
>"subscribe sanet-mg-digest".
>
>All messages to sanet-mg are archived at:
>http://www.sare.org/htdocs/hypermail
>
>------------------------------
>
>End of sanet-mg-digest V1 #1540
>*******************************
>
>
>To Unsubscribe: Email majordomo@ces.ncsu.edu with the comannd
>"unsubscribe sanet-mg-digest".
>Date: 17 January 2000
From:James Moffett, Organic Agricultural Association of South Africa
Re: Urea
Greeting to everybody. I have had an enquiry as to why urea cannot be used
in organic animal feed. I need some scientific detail here to answer this
query and am hoping someone can direct me. We are in the process of drawing
up regulations for organic ag. Thank you.
To Unsubscribe: Email majordomo@ces.ncsu.edu with the command
"unsubscribe sanet-mg". If you receive the digest format, use the command
"unsubscribe sanet-mg-digest".
To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command
"subscribe sanet-mg-digest".
All messages to sanet-mg are archived at:
http://www.sare.org/htdocs/hypermail
This archive was generated by hypermail 2b29 : Sun Feb 06 2000 - 12:00:21 EST