I won't argue w/anyone re. the perceived need for AMS. I think I've heard the theory of "AMS has to be in water BEFORE glyphosate because......" at least 1,000,000 times.

So-I just went & checked Monsanto Roundup Original Max label. In "mixing order", it doesn't mention adding AMS first. Under the additives, it mentions that AMS might help. Doesn't mention why. Another section says do NOT use water w/dirt in it.

Maybe I'm misreading it:

http://www.cdms.net/ldat/ld6DP018.pdf