[ncmncm]

Tractors are very expensive. Farmers will not replace them just for this. And, they need to operate all day long, which would take a hell of a lot of battery.

Retrofitting with ammonia tankage and plumbing (making them cheaper to run) is an expense they might prefer to avoid until they have a reliable secondary supply of ammonia.

[throwaway894345]

They need to run all day and all night for ~2 weeks straight twice a year and then they can sit idle most of the rest of the time. But during those 4 weeks charging for one out of every three hours (I’m assuming that a big tractor pulling a big implement is going to deplete even a really big battery fast and charging a battery that large is probably going to take a long time) isn’t going to be tolerable.