Hey UB.
Just finished reading this great thread. So considering the point of this thread, that weed is very pH tolerant and it is rarely a problem for soil, do you recommend even owning a pH meter? I noticed you said you have a Hanna, but that could easily be just for conducting experiments considering your inquisitive nature. Do you ever use a pH meter to diagnose problems? All questions are for soil.
Also, I am starting to think I need a TDS meter more than anything. I don't know anything about my water except it is hard. I don't know how hard though. What are some common problems from having too many ppm? I know you have talked about there being a balance, and if something is in excess, something else is deficient. That makes sense to me right now. Something is getting locked out and something is in excess. I mix 1Tbsp of Jack's 30-10-10, or recently 10-30-20, with 2 gallons of water, which is half strength. When I feed with the 1Tbsp per 2 gallon mix, I also have my drip system running (7-14 min, non-pressure regulating emitters) which in my mind means a more dilute dose of nutes.
After I flush my raised bed with a hose, does it make sense to replenish the soil with nutes?
How big of a role can heat play in plant health? I imagine it is strain specific, but in general is there any reason plants couldn't thrive in 105F+ temps, especially if they face east and are out of the sun around noon. I have rather dry, thin feeling leaves. They don't feel smooth and robust (?) like I imagine healthy plants feel. They are sativa dominant if that means anything. I know indicas get those fat, juicy looking leaves. I water twice per day via drip for a total of 18 minutes.
And last, and the original intent of this post, are there any pH and/or EC/TDS meters you would recommend for soil? I am looking at about 5 options right now, but I don't know whether to go with a combo unit or individual meters. Willing to spend around $140.
Combo meters
http://www.eseasongear.com/miinmwsmphec1.html
http://www.eseasongear.com/hannahi98129.html
http://www.eseasongear.com/hahiphmo99ne.html
pH meters
http://www.eseasongear.com/mimwsmphme1.html
http://www.eseasongear.com/hmphphmewafs.html
TDS meters
http://www.eseasongear.com/tdsecmeters.html
Any input is much appreciated. This isn't the first time you have helped me with your wonderful threads. Sorry for going off topic a bit, but it is so tempting to pick your brain when a relevant question comes up.