Agricultural futures markets live for and exist on uncertainty since that is what creates volatility, which is their lifeblood. All the usual sources of doubt about potential supplies and demand are present, although elements of some seem more extreme than usual this year.Agricultural futures markets live for and exist on uncertainty since that is what creates volatility, which is their lifeblood. If the annual production of agricultural crops and demand for them were not rife with uncertainties, no variables existed and all outcomes were known in advance, there would be no futures markets. Instead, the ambiguities involved led directly to the evolution of those markets, which in turn add another level of uncertainty to the mix.Late May in...