Ag Weather Forum

Crop Progress Maintains Status Quo

Bryce Anderson
By  Bryce Anderson , Ag Meteorologist Emeritus
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Corn in the dough stage, at 39%, is only about half the rate of one year ago. (DTN file photo by Pamela Smith)

The USDA crop production reports Aug. 12 had some surprising numbers, but the crop progress and condition reports did not. The details again show that corn and soybeans are walking the walk toward maturity: advancing, but not leaping.

For the corn crop, the dough stage sends a tangible message that things are moving along toward maturity. And, as of Aug. 11, that harbinger of harvest totaled just 39% in the 18 major corn production states. That's a slow rate; 32 percentage points below the 71% counted a year ago, and 22 points below the five-year average of 61%. North Dakota's corn is only 7% in the dough stage; Wisconsin, 14%; and South Dakota, just 25%. Iowa, Illinois and Nebraska were in the 40s-percent range; Indiana and Minnesota at around 30%.

There's also the pollination rate. These numbers approaching mid-August are not looking good: Indiana, 79% (21% not pollinated); Michigan, 65% (35% not pollinated); Ohio, 71% (29% not pollinated); Wisconsin, 72% (28% not pollinated). In the Dakotas, the non-pollinated percentage is from 11 to 15%. For the top 18 states as an entity, there's still 10% left to pollinate -- in the middle of August. All in all, the corn crop is around 10 days to two weeks behind average in its progress.

In soybeans, the big item is that conditions are the lowest since the drought year 2012. The blooming percentage, 82%, is 11 percentage points behind the average 93%. Beans setting pods are now at 54%, 22 points behind the 76% average. Progress is, of course, the furthest behind in the eastern Midwest, with Indiana, Michigan and Ohio running from 40 to 45 percentage points behind average. However, Illinois, South Dakota, Wisconsin and Iowa are also from 25 to 30 percentage points behind average, so there's a lot of late soybean progress going on.

Crop weather for the next week does not change very much from the current pattern. We will generally stay the same, with cool conditions north and warm to hot south and southeast. A big key is the prospect for rain in the southern and eastern Midwest, especially since the past six weeks were dry. We saw some rain overnight Sunday into Monday, and again overnight Monday into Tuesday, in the central and southern Midwest. More of that is needed to help these late crops perform. Rain prospects in the next week to 10 days are variable, but do offer some moisture for the drier areas of the southern and eastern Midwest.

Looking further out, analog studies based on the following criteria -- neutral El Nino/La Nina, a negative Quasi-Biennial Oscillation (QBO) by the end of the year, a positive Pacific Decadal Oscillation (PDO), and a positive Atlantic Multi-decadal Oscillation (AMO) -- suggest that September temperatures will be above normal, with October near normal across most central U.S. areas. The implication is that an early freeze is a low probability. Such a scenario does give crops a chance to make the most out of this delayed season.

Bryce Anderson can be reached at

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