Snowy, what in your opinion would be the best stuff to use to get rid of weeds, especially in my case that jap knotweed.
Steady on there, no need to take that tone
I think someone is getting muxed up between (NH4)2SO4 which is a fertilizer and H6N2O3S which is a weedkiller
No names no packdrill
Put Ammonium Sulfamate on your crops, then Ammonium Sulfate on your weeds then see what happens
The reason Ammonium Sulphamate was never used on a large commercial scale is simply that of cost. It is costly to manufacture, and so far as I am aware, it always has been. People will often use the cheapest alternative in a domestic situation; in commercial growing it is a necessity.
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Is that what the weed shown above is?
This is the stuff you want
Ammonium Sulphamate from
it's not available as a "weed killer" any more as the manufacturers refused to test it on Dogs, despite the long history of its use. So it was withdrawn. You can buy it as "Compost accelerator" but the link above supplies 100%, a bit expensive these days, but it can kill a fully grown tree. It then converts it to compost.