I befriended with a belgian who is graduated as agronomic engineer, he lives north-est of France since a dozen of years. His name is Yannick Vandoorne and he's a wonderful guy.
He studied what he names "electroculture", a couple of passive methods to improve the grow but also the good wealth of plants. And among his researches, there's the pyramid. You need to have a pyramid which respect the golden ratio, the angles of the pyramid must be ... hum ... "angular", i mean, not rounded, and last but not least, you have to turn the pyramid in order to have its sides perpendicular to the cardinale points (spot the north and position it to have one side perpendicular to it), and then it's magic, all plants that grow under the pyramid but also a bit around (but not much more than a few centimers) will grow better and be stronger.
He made his business on this an many other tricks he found. What was the most impressive was in the original reportage i watched one day, 10+y before, name of this french reportage is "Resonnance" (from Serge Fretto) - i was unable to find it on the web, just a passage (
link of 15m extrait on youtube - french), Yannick "dynamised" a whole field with what he name his "beeswax capacitors", and the results were wonderful. Of course, from one year to another the harversting naturally varies, but once a field is dynamised, it produce a good % more (calculated in tonnages of recolted crops / vegetables / ...)
He also made researches on water dynamised based on Marcel Violet researches, and, as my cousin did, he recreated the device and sell it.
To come back to the pyramids, the good thing is that Yannick is a ... let's say a natural STO candidate. He does not force any to buy his stuff and enjoys explaining how to build one's own pyramid + give many information. What he sells is the 4 corners + the top corner of the a pyramid, that he soldered, in copper, and you just have to buy 8x 1 metre copper pipes of the good diameter and builkd your 1m large pyramid. I have a small one here on my desk since ... 8 years, one of +/- 30cm, you can use it to dynamise water, stones that well retains the .. energy, or put seeds before planting them. Many other things to say about, but i don't remember all and since 10y i never had time to put this in practice, i just had a plan to build a 5m pyramid to put in the garden, i have the eight 5m copper pipes at home since ages now (

) but i'll use them once, that i'm sure :)
If you can read french, here's the page on Yannick's website which explains many things about pyramid in agronomy, it's a goldmine of information :
Effets des pyramides sur les plantes et organismes vivants.
www.electroculturevandoorne.com
And here's the auto-translated to english link
just that ... he made some video in english, but not all
Here's the scheme of the pyramid, with right numbers, you can find it on the page :
His website is a bit scratchy and old ... I should have open a thread on this subject here on the forum but never took the time to

But for those who have a garden, i recommend to browse his website. And, yes, you can trust him, just watch his video, if you have a good human feeling you'll directly understand that he's a good person, naturally honest, and who love what he does. He even made some videos in english, he has a nice accent :)
Last comment : it's true that looking at the "bright" penurious incoming months/years, knowing this kind of "tricks" to help your garden to grow better & stronger is good to know.