IEM Daily Feature
Monday, 27 February 2023

2022 Corn Yield Departures

Posted: 27 Feb 2023 05:30 AM

The USDA National Agricultural Statistics Service (NASS) released their county level 2022 yield estimates on Friday. The featured map presents an IEM computed corn yield departure of the 2022 value from a simple average over the ten most recent years. A negative value would indicate a yield that was below the past ten year average. The varying impacts of the 2022 drought are generally reflected in this map with most negative numbers found over southern Iowa and far western Iowa. It is rather interesting to see the variability shown over northwestern Iowa. Drought conditions were highly variable in this area as well. It wasn't as if the drought of 2022 featured no rainfall over large chunks of the state over large number of days, instead rainfalls were fickle and some fields got just enough and timely rainfalls to make a good crop, while others nearby were not so lucky. You can generate this map for big drought years like 2012 and you will see a remarkable difference in impact.

Voting:
Good = 12
Bad = 1
Abstain = 1