K
keithrs
Guest
Ya I saw this article when I was looking at things in the past.
Actually if you look at table 3 it shows that as K goes up, Ca an Mg go down (and significantly) all those little ABC's off to the side denote which items in that column are statistically significant.
In table 3 they only show the lowest K at 100 ppm (for Phales) 50ppm for the other genera, so we are dealing pretty much with the old MSU data that looked at orchids already exposed to high K.
Note that the K is always higher than Ca/Mg This ain't like it is in the jungle, where K is lower than 5ppm and Ca higher than K
How about the fact that the Catt. had a dramatic reduction in growth as N went up and even more so on root production!