While the percent of U.S. corn acres having reached the dented stage appears to be near the five-year average, actual crop progress has already been and may be further delayed due to unseasonably cool weather. According to a report released on Aug. 24 by the U.S. Department of Agriculture (USDA), 39% of corn acres had reached the dented stage as of Aug. 23, only four points behind the five-year average for this time. While corn doughing surpassed the five-year average progress by four points, key states lag in denting progress and, with cool weather forecast for much of the Corn Belt this week, progress will likely slow further.
With Iowa, trailing the five-year average for percentage of acres denting by 10 points, Indiana, Michigan, Nebraska and Tennessee have fallen nine points behind the five-year average for acres reaching denting by this point.
In parts of Iowa and Nebraska, growing degree days, a key indicator, are running behind normal and, thus, could slow maturation. While Indiana and Tennessee are ahead of the normal number of growing degree days, excessive rains likely slowed planting and thus impacted progress.
Crop condition estimates remained approximately the same with 69% of acres rated in good or excellent condition. At this point last year, 73% of corn acres were in good or excellent condition.
(Source – http://www.blackseagrain.net/novosti/cool-weather-delays-u-s-corn-progress)