Water retained by various soil ingredients

Gastil marygastil@yahoo.com
Tue, 30 Oct 2012 09:04:38 PDT
I use coir for some bulb growing media so I had planned to do this test also.  Mike and I are converting your 1 L tests to add them to the chart. 
Your point abut the coir block needing to be expanded first is important. Yes the test is based on volume and the water 1 ml = 1 g equivalent. My own experiment is in the re-dry stage. I am also concerned about salt so I soak and pour-off water three times before using coir.  

I see the SERAMIS is equivalent to the non-clumping kitty litter or Akadama or Turface. I have not tried those. 

Hans-Werner Hammen wrote:
> If I reconstitute COCO from Coco-Block, and let the loose 
substrate re-dry, then it will shrink but almost negligibly.When I put 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.
> BTW 1 Liter of dry 
SERAMIS, in the same "experiment" becomes 250 grams heavier. Everybody 
can (try to) verify the Results for themselves.I am curious whether 
anybody will obtain conspicuously different results xD

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