Corn Harvest progress was slow last week, advancing just 2.2 percent partly due to heavy rains that prevented combines from entering fields. The other reason for corn harvest slowing is that the soybean crop is starting to be ready for harvest, and farmers are switching their focus to the oilseed. Soybeans need to be harvested as soon as they’re ready, otherwise they will start losing yield due to pods falling off or beans sprouting in the pods. Corn, however, can wait without losing yield, which is why farmers dramatically shift to harvesting soybeans once they’re ready.  

Last week was complicated from a logistic standpoint. Despite the fact that agriculture is exempt from the COVID-19 quarantines imposed by the...