Science Buddies: "Ask an Expert"

Posted: **Sun Jul 30, 2017 3:07 am**

What should be done to measure the amount of N P K Ca Mg each separately in solution (PPM)?
solution is very dark
Error up to 10% is acceptable

Posted: **Wed Aug 02, 2017 1:11 pm**

You have posted 2 questions with similar topics in separate forums. Please see my reply to your most recent post:

viewtopic.php?f=29&t=17854&p=61023#p61023

What should be done to measure the amount of N P K Ca Mg each separately in solution (PPM)?