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 > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/