Welcome back Frank. What salts are you using to allow you to change the ratios? Would be useful for dealing in during transition from veg to flower nutes. Any discernible differences to plant health/growth?Studies like that are good, but also not so enlightening due to the fact they only change one variable.
"Fertilization treatments began the day of transplant. Four fertility concentrations of 15, 60, 120, and 180 mg·L–1"
It's often hard to guage what's happening when only making slight changes to one element due to the synergism/antagonism between minerals in the rootzone.
For example the negative effects of increased P could be because it is starting to lock out calcium within the rootzone and without a subsequent increase in calcium your gonna have issues.
Regardless I have dropped P and Mg levels in my most recent salt mix and it seems to be working well. Down to running P at around 60ppm in solution
3.0 ec is impressive across multiple strains. Are you able to run those levels because your nutrient ratios, relative to each other, are dialled in ? There's an off the shelf line from "Athena" that few growers seem to be regularly running around 3.0ec levels.Hey mate, I've been using Calcium Nitrate, Mono potassium Phosphate, Potassium Sulfate, Magnesium sulfate and a micronutrient mix, i am using hydrobuddy to formulate and just mixing salts per 100l res at the moment until I find a general recipe that works the best in my enviorment for multiple strains then I will make a concentrated stock solution of it for future use.
Last run I was running very high P and MG in my mix, with large drybacks at 3.0 ec I was finding I was having calcium issues not due to lack of calcium. I assumed it as the extra P and MG abuilding up in the media and locking out Calcium. No issues since dropping P down a bit I also have gone back to 2.4ec inputs and aiming to build up EC in medium with drybacks rather than smashing the plants at 3.0ec seems to work better and I get less wastage.
This was a really interesting podcast! So many variables though... Like what targets are required in relation to calcium, potassium and magnesium saturation? I have a feeling that higher P levels become much more important in higher CEC soils with high saturation of other cations, especially potassium.This is a gooqqd read..
or if your a lazy fucker like me you can listen to Patrick Veazie talk to Tad Hussey on his cannabis science and cultivation podcast
Yeah my thoughts too, I agree.Studies like that are good, but also not so enlightening due to the fact they only change one variable.
"Fertilization treatments began the day of transplant. Four fertility concentrations of 15, 60, 120, and 180 mg·L–1"
It's often hard to guage what's happening when only making slight changes to one element due to the synergism/antagonism between minerals in the rootzone.
For example the negative effects of increased P could be because it is starting to lock out calcium within the rootzone and without a subsequent increase in calcium your gonna have issues.
Regardless I have dropped P and Mg levels in my most recent salt mix and it seems to be working well. Down to running P at around 60ppm in solution
Apparently P binds with aluminium and iron to create a cation, pushing out Ca, Mg, K etc... So lower numbers of iron and aluminium would definitely help. So many variablesThis was a really interesting podcast! So many variables though... Like what targets are required in relation to calcium, potassium and magnesium saturation? I have a feeling that higher P levels become much more important in higher CEC soils with high saturation of other cations, especially potassium.