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Is it a mix of both? I think I've noted 13 series circuits here, all feeding from the one big positive pad (see green overlay). If this is the case, how does the power get equally distributed to each of the 13 series circuits? Please be kind :) I have a limited idea of electronics. I believe...

https://planthardiness.ars.usda.gov/ Here's a closeup of Massachusetts.

How does dimming work on an LED panel? Does the power supply voltage drop like analog incandescents? Or does the supply get chopped up like I've read with PWM? I'm interested in constant current output but PWM adjusted duty cycle coming out of a power driver. Is this even such a thing and who...

I have a technical question about thermal management with mid-power LED diodes like Samsung LM301H. Do you use thermal vias on the PC board anymore? Either under the LED diode footprint or even around the footprint? I was reading about this on a ten year old application note from Cree called...

You can rent these spectrum meters for under $120/2days. This Sekonic C-800 meter retails for over $1600. Perfect for setting up veg and flower rooms with different lights/spectrum. Lensrentals.com out of Memphis, TN. https://www.lensrentals.com/rent/sekonic-c-800-spectromaster-color-meter

A new video from Dr. Bruce Bugby. Either added to media or to solution, silica is very promising. I'm adding wollastonite to my next run. :bigjoint:

Video presents alternative sterilization method using microwave oven. Also some protocols for cannabis.

Dr. Justice, my new favorite researcher, on drying and curing :) [VIDEO] "Master the Art of Drying and Curing" With Dr. Allison Justice https://www.cannabisbusinesstimes.com/media/master-art-drying-curing-cannabis-conference-2022/ [YouTube] The Science of Drying and Curing - Allison Justice...

How do we measure when evaluating Mycorrhizae concentrations? I'm confused. Do we consider just propagules per gram? Or does the percent inert ingredients need to be accounted for? Here are some sample labels. Dynomyco: 5% microorganism but 900 propagules/g Myco Bliss: 2%? And 1000...

Cool electron microscope pics of trichomes! Caption and source link to research below. Secretion of resin from glandular heads. a, b) Highly magnified heads using macrophotography and phase contrast imaging showing distribution of vesicles inside the heads. A ring of secretory cells can...

Pesticides Allowed for Use on Cannabis in Colorado for Cannabis https://ag.colorado.gov/plants/pesticides/pesticide-use-in-cannabis-production-information Attached a pdf and zip with excel spreadsheet.

https://jorge-cervantes.com/cannabis-nutrient-deficiencies-excesses/ I like the illustrations here. According to the latest book from Jorge Cervantes, they can be shared freely, just keep the website. Here are examples of NPK:

Anyone else using this mix? It is supposed to give balanced silicon and pH. The mix they use is for all their studies is: 75% peat 13% vermiculite 12% rice hulls 0.7kg/m3 wetting agent 1kg/m3 wollastonite (equals 1g/L) 1.3kg/m3 hydrated lime Here is a publication documenting performance of...

Attached a transcript of this video. It's old but still has worthwhile gems. Like, I learned vermiculte provides silica. VIDEO CONTENT 00:00 - Intro 00:58 – What are the nine cardinal parameters of growth 2:12 – Optimizing Light 10:52 – Best temperature 11:55 – Best humidity 13:42 – Wind...

Best Grow Lighting for Cannabis with Dr Bruce Bugbee | Far red ePAR A complete guide to the best grow light spectrum and PAR intensity for cannabis with scientist Dr Bruce Bugbee, Founder of Apogee Instruments and professor at Utah state university. We discuss recent studies on the effect of far...

Hello. I'm finding this sensor is great for remote readings via WIFI connection! I can download the temperature readings into a CSV file just fine. But the data field contains not just the reading, say 76 degress, but is followed by a long string of characters. Here is an example...

https://drive.google.com/file/d/1JFCsH97TAfqgQCzDlRYop_kUVufdk-3R/view?usp=sharing