It also fits well with some ideas from Denmark to find new catalysts to allow intermittent processes to make ammonia from solar power, with the idea that the ammonia when mixed with water can be used as fertiliser.
Solar power + intermittent synthesis methods fits really well together for a less centralised economy.
The simplest way to make nitrogen fertilizer from excess electrical power is by electric discharge to make NOx.
I remember a science museum exhibit of a simple spark device. It was in an enclosed box to prevent gases from escaping, and the air inside was noticeably brown from all the accumulated NO2.
Commercially, a similar process was used for a while a century ago, the Birkeland-Eyde process. It passed air through an arc. It was phased out because it wasn't competitive with the HB process using hydrogen from fossil fuels.
Solar power + intermittent synthesis methods fits really well together for a less centralised economy.