paperchaser825
Active member
please post the link. thanks!
I can't find the link now, but the jist is this:
They take a tissue sample from the top of the plant (new growth) and the bottom of the plant (oldest growth).
Let's say your nitrogen content at the top of the plant was 1500 but the bottom of the plant was 2000. According to these testers, that means you need to up your nitrogen.
If the opposite was true, apparently you would need to back off the nitrogen. I wish I could find the link......