Humans do get nearly all of their mineral requirements from food. But if you sweat a lot and are drinking a lot of water, and don't take in enough electrolytes

Humans do get nearly all of their mineral requirements from food. But if you sweat a lot and are drinking a lot of water, and don't take in enough electrolytes, you can quickly get into serious trouble. This is why factories in the south used to give their workers salt tablets. It is allegedly also why certain soft drinks were invented. The OP's question about distilled water is valid. But since it seems this is primarily targeted at irrigation, it shouldn't be a problem. Presumably this will be a slow drip type of irrigation and no minerals will be washed away, so when the water evaporates again everything that wasn't taken away with the plants is still there. Nutrient loss from crop harvesting can be countermanded with fertilizers. Perhaps organic fertilizers made from the very crops consumed...