Agriculture fertilizer in general is undervalued because of disruption from many factors not just this war. There is greater world GDP growth, growing populations and development of economies away from an agrarian self sufficiency economicy in terms of food more supply will be needed from those with land capable of mass production. Russia trying to bully a nearby country into its cartel influence for money making and power advantage is not out of character. The bigger problem might be global warming or altering weather patterns, this will alter current food production and require new land to be found and enriched.
I don't believe this will happen anytime sooner. Most countries have enough wheat supplies. Also I have seen in news - Putin announced he has enough wheat to supply to the countries who would be needing it.
Russia is unstoppable.
Russia can be stopped. Its not like its just the people in EU and US can think better. China doesn't create war but where are they now, they are the ones where bank go for bailout and US takes loan from them to give to Ukraine.
Putin is also a reasonable man, it just need a mutual relationship.
As long as Zelensky is open to negotiate. He only have to listen to himself and not to EU and the West that pushes them get into this war. They don't even profit from this. Zelensky just have to use the alternative route before its too late. He doesn't have to wait when all are hungry and cold that his private soldiers will decide to shoot him to end this war.