| ▲ | koverstreet 4 hours ago |
| Are you forgetting the nitrogen? :) |
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| ▲ | fullstop 4 hours ago | parent | next [-] |
| The US produces most of their own nitrogen, but the same is not true of potash. |
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| ▲ | mythrwy 3 hours ago | parent [-] | | 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. | | |
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| ▲ | bluGill 4 hours ago | parent | prev [-] |
| The US provides a lot of its own supply there. |
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| ▲ | colechristensen 4 hours ago | parent [-] | | 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. |
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