Market Farming

[<sunnfarm AT netscape.com>]

You might have seen work done in the late 1980's in NJ through Rutgers 
University. It was the first time I saw hot water bottom heating in a 
hoophouse in Vineland NJ. They used deep sand over heating tubes as a media 
to grow what would become bare root transplants for the field. The sand made 
it easy to pull plants without harming the roots. Plants went directly into 
the field within minutes after pulling... Bob.
Sunny Meadow Farm
Bridgeton, NJ.

--- johnshong AT centurytel.net wrote:

From: "John Shong" <johnshong AT centurytel.net>
To: <market-farming AT lists.ibiblio.org>
Subject: [Market-farming] Greenhouse Heating
Date: Wed, 16 Feb 2011 08:55:25 -0600

I think that sand wet enough to be a better conductor ... (?if it would do 
so?) ... would provide an environment (humidity) in which disease / algae 
problems would arise.

I wish I had a record of where this info was found ... sorry but no luck 
looking.

I did a search ... typed just as follows: sand and in and floor and heat.
Scrolled down the list ... think there might be some stuff that could answer 
some of your questions or lead you in the right direction.

John

>
> Could you not wet the sand? I would think wet sand would be a lot
> better as a heat conductor than dry sant
>
>
>
> On Tue, Feb 8, 2011 at 9:27 AM, John Shong <johnshong AT centurytel.net> 
> wrote:
>> Re the use of sand for infloor systems.
>> If that is your best/only option ... it may be workable.
>> Did lot of research several years ago when I was installing mine.
>> I did mine the "conventional" way.
>> Re using sand: They did plastic first ... then insulation ... then the 
>> sand
>> ... but if my memory is correct they used a lot more sand than you ... 
>> seems
>> like it was 18".
>> A few hours reseach on the internet should provide some insight.
>> Sorry dont have any links saved from back when I did this.
>> John
>> Fern Creek Gardens
>>


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