if i remember correctly its the the most recent(new growth) fully formed leaf after mid day(in the afternoon)
anybody else?
anybody else?
Dam, didn't see this thread. Looks like I found what I am watching during harvest this year. Thanks C-ray, I am using AEA products right now and I have been really liking them so far. Their science is second to none.
https://web.archive.org/web/2014062...ng-mistaken-conclusions-that-seem-scientific/
Soil Balancing: Mistaken Conclusions That Seem Scientific
Right, but most pH sap testing doesn't involve vicing plant leaves. It's not at all practical for cannabis.
Sea, statements like that are vexing, just putting it out there. To make a comparison between the accuracy of pH strips and bud quality as a gauge for soil rightness is putting words in someone's mouth and asking them to refute it. I gauge whether my soil is 'right' not by how high the bud gets me but by things like the health of my plants and things like cec and soil testing. A right soil is one that grows healthy plants without nutrient lockout or deficiencies.
If having a pH at 6.4 is what you're aiming for, the testing is only useful in figuring out your soil "formula" for future soil builds. Say you bungle and your soil is off and your pH is like 5.9. I do not see what you could do to fix off pH in soil at the time. Any lesson learned can only be beneficial for future soil mixes.
Please do direct to me where I can find this 'second to none' science.
Overall their (AEA) products appear to be nothing more than the usual mixed and remixed bag(s) of;
Leonardite
Rock Phosphate
Molasses
Urea
Calcium Nitrate
Calcite
Potassium acetate
Potassium Sulfate
Kelp
Magnesium Chloride
Boric Acid
Cobalt Sulfate
Copper Sulfate
Zinc Sulfate
Manganese Sulfate
Sodium Molybdate
Zinc Sulfate
Sodium Molybdate
Yucca
Seaweed
The most interesting of which are seaweed and yucca. Of course there is the typical obligatory mycorrhiza added in here and there for marketing effect.
Also in their line is Seacrop which I've heard varying reports about.
Seashield sounds interesting as it contains fish but appears to have no phosphoric or sulphuric acid added as a stabilizer. I'd be interested in researching this.
A point I've just been made aware of is that there is a possibility that the phosphoric acid used in fish hydrolysate could add a much higher level of soluble phosphorus to the soil solution than I previously thought. More research is required on my part to come to a conclusion on this.
The plant leaf (sap) analysis is a joke. AEA does not even do it but passes it on to a real laboratory. Tissue analysis does make sense. It is something farmer's have used for many years. A nutrient tissue analysis provides what nutrients the plants are actually uptaking. It makes way more sense than soil testing. I almost feel sorry for the blueberry farmer who really does not appear to have a clue about what he is trying to say. He is reporting on the success he found in growing naturally with living soil. He does not appear to have a foundational understanding of why he is seeing this success so he is open to believing what he is told.
The part about the insects avoiding a certain frequency ..?? Obviously someone bent his ear. Data would be interesting. Ya never know, eh?
Note that quite possibly the greatest reason for improved success is the pruning of the canes. This increases growth vigor and berry production in both brambles and blueberries. I'm glad he mentioned it.
You know that I support and believe in living soil growing but really, is this poor guy just being led a little bit further than required, so he can be convinced that he needs all these products?