Will guano help, or is sodiumnitrate or potash the thing?
2
An immense well is located in this particular spot which gushes forth a never-ending saline solution, highly impregnated with sodiumnitrate, potash and other salts.
3
E251: Sodiumnitrate (used in curing items like sausages)
4
Sodiumnitrate is also used in fertilisers and preservatives but it has been banned in Afghanistan for years.