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I did use the 32% in place of the AMS. Should I have used the AMS? Thanks
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No, replacing AMS with 32% is alright. Alot of growers with smaller pull type sprayers do it because the AMS eats up their pumps.
If you had a higher rate of 32%, that would be why your poast didn't work, it would have burnt the grass and wouldn't allow it to take in the poast. Really don't know why it didn't work, it is generally a pretty decent product.