npk question

lets say after 10 or even 30 days into veg, i want to check the soil's nutes (n,p,k ratios)..is there a tool for this? or is this something i learn through experience? from adding and observing??-please help

well do u have a PH tester ? you can also buy a tool to tell the PPM

so the results of my ph test show if my nutes are ok in ratio? ----- i thought pH was something totally separate from nutes and what not..please can you explain further ?

this might help ,,Marijuana Growing: Jorge's FAQ Water : What is the difference between PPM, EC, TDS, DS and CF?

I gotta say tho adding and observing is the best tool , make sure that ur pnats dont start yelowing at tips and wut not if they do adjust nutrients

mass spectrometry would be a great way....also highly impractical and highly improbable. but its a fun thought

whoa, what?