So I was reading through UB's Phosphorous thread on RIU (where he being the old fart that continually needs external validation, brings up his old OG sticky threads that had "over 150k views' , not 2 mention on OpG he once again, touts that his sticky threads on RiU, after shameless plug/links to them, have x # of views) and I see UB spent more than an hour reading through this link on an orchid site.
Guess UB is getting really bad with his memory in advancing age...maybe those spinout™ trace amounts of copper ions are doing a number on his brain that the blood tests can't show...wow, that would be a shocker :D.
For UB forgot (conveniently bc it doesn't prop up his ego/neediness ) about the 'other' orchid link I provided that has the same info from Bill Argo, same guy who helped develop the MSU orchid low P formula's.
That link UB, here it is again, lots of useful info:
http://www.firstrays.com/free_info.htm" onclick="window.open(this.href);return false;
http://www.firstrays.com/nutrition.htm" onclick="window.open(this.href);return false;
^4 arb, juicy, etc. d/l the 'substrates' pdf link, *read* it and weep . examples juicy? of substrates vs 'media' semantics?
xtra link needed:
http://www.greenhousegrower.com/magazine/?storyid=47" onclick="window.open(this.href);return false;
When an acidic fertilizer solution was applied to the impatiens grown in the different media, pH of the rockwool medium tended to be higher than for the other media. In all media, however, the pH dropped very quickly to a low of about 4 (Figure 2) regardless of the CEC of the media.
When shoot-tissue calcium was tested after four, eight, 12 or 17 weeks of growth, there was little difference between plants grown in the media with low CEC (rockwool perlite) or relatively high CEC (consumer grade peat/perlite). The media-CEC therefore did not act as a buffer to nutrient levels available for plant uptake.
The conclusion of these and other experiments was that CEC from peat has little or no effect on either pH management or calcium and magnesium management in container grown crops.