The US does have potash mines for example around Carlsbad New Mexico. But these cover only a percentage of domestic need. Perhaps they could be scaled up not sure.
Nitrogen is pulled out of the air which is free but the process requires hydrogen which is acquired from disassembled methane, the price of which is a significant contributor.
The US produces most of their own nitrogen, but the same is not true of potash.
The US does have potash mines for example around Carlsbad New Mexico. But these cover only a percentage of domestic need. Perhaps they could be scaled up not sure.
Also famously near Moab, Utah.
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The US provides a lot of its own supply there.
Nitrogen is pulled out of the air which is free but the process requires hydrogen which is acquired from disassembled methane, the price of which is a significant contributor.
US shale oil notably has a lot of natural gas - methane.
the methane isnt the issue, building and operating the processing plants is
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