Water retained by various soil ingredients

Hans-Werner Hammen haweha@hotmail.com
Tue, 30 Oct 2012 14:38:08 PDT

Conversion could be avoided by providing all results dimension-less, x = Volume_Of_Water PER Volume_Of_Substrate_at_ Final_Density_in-Pot, in PerCent  Coco Coir, x=0,5=50%, and Seramis x=25%  
KIND Salutations from Germany, and Ounces and Cups have me, admittedly, giggle - I am simply unfamiliar with these! ......................................................................................................................................................................................... > Date: Tue, 30 Oct 2012 14:11:11 -0700
> From: marygastil@yahoo.com
> To: pbs@lists.ibiblio.org
> Subject: Re: [pbs] Water retained by various soil ingredients
> 
> Converting Hans-Werner's results to ounces and cups to compare to Mike's:
> 
> > 1 Liter of this dry substrate into a pot, the bottom and drainage holes respectively covered with a net (so no substrate will  escape after rinsing) WEIGH it before and after RINSING and DRAINING thorougly, the whole container will become 500 grams heavier.
> > 1 Liter of dry SERAMIS, in the same "experiment" becomes 250 grams heavier. 
> 
> 
> By my calculation, Hans' coir retained 4.2 oz water per half cup and his seramis retained 2.1 oz / half cup. 
> 
> So, if Im correct, then coir retains 4.2 times as much water than Mike's #2 sand (at 1 oz water per half cup) 
> and seramis retains 2.1 times as much water as the sand.
> This would indicate that coir retains a lot more water than peat.
> 
> I would welcome someone's scrutiny of my calculations.  Corrections welcome!
> 
> - Gastil
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