We have noted in the past that for a variety of reasons corn and soybean acreage has increased quite dramatically in both North and South Dakota over the years and the graphic shows the Dakotas will account for almost 10% of all U.S. corn planted area this year vs. 7.6% last year and just 6.8% 20 years ago.
These two states along with TN and those states not in the top 18 referred to as others have seen their share of U.S. corn acreage increase over the years, yet they average only 80-90% of the national yield.
Interesting to note that many of the higher yielding states Midwest states such as IL, IN, IA and OH have seen their share of U.S. corn planted area go down.
The second point is that the Dakotas along with other key Corn Belt states are very dry.
The PDSI uses readily available temperature and precipitation data to estimate relative dryness.
It is a standardized index that generally spans -10 (dry) to +10 (wet) though more typically shows a range of -4 to +4.
Any reading below -2.00 is moderate drought, -3.00 or below severe drought and -4.00 or below is extreme drought.
Of the 18 states CO is in a dire situation as is much of the western U.S with a reading of -5.64, but ND in a critical situation at -3.39 with TX at -2.58, MI at -1.75 and IA, the largest corn growing state that had a myriad of problems last year coming in at -1.33.
Maybe the most noteworthy item in this graphic is only one state, North Carolina, has a higher PDSI reading now than a year ago.
Some differences are sizable especially in the Dakotas and Michigan where huge problems with excess wetness in 2020 have been replaced by big trepidation about extremely dry soil moisture conditions this spring.
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