Crop Tech

July 26, 2013 09:32 PM

Corn Drydown Rates

With the growth of most corn crops slightly past the mid-point for the year, it’s not too early to start thinking about when to begin harvest. Corn reaches physiological maturity, or black layer, at roughly 30% moisture. However, the optimum harvest moisture content for corn is between 23% and 25%.

In general, it takes 30 growing degree units per point of moisture to dry corn from black layer to the optimum harvest level. Typical drying rates range from 0.4% to 0.8% loss of moisture content per day.  

Getting in the field at the right time can add up to a significant advantage. If you harvest corn at the optimum moisture level, you stand a good chance of keeping yield losses to a respectable 2% or less. However, if you wait, say until 19%, you might see excessive harvest losses, as a result of stalk lodging and ear drop problems, of 3% to 8% or even more. 

See the Predicted Grain Moisture at Harvest chart for more information.

Saluki Soybeans

The Saluki, called the Persian Greyhound and the royal dog of Egypt, is one of the oldest breeds of domesticated dogs in the world—and the mascot for Southern Illinois University (SIU) in Carbondale, Ill. Plant breeders there have developed a new soybean called Saluki 4313 that combines high yield potential with resistance to soybean cyst nematode (SCN), says Stella Kantartzi, associate professor and principal investigator in the SIU plant breeding and genetics lab. The variety, intended for Midwest production, topped the 2012 USDA uniform tests, Southern States, with a yield of 53.8 bu. per acre, and ranked third in SCN regional tests. Small quantities are available for research purposes.

Fungicide Decisions

ID 455

A new publication designed to help farmers make fungicide-related decisions is now available through Purdue University Extension. The guide, Fungicides for Field Crops, was edited by specialists from five universities and printed by the American Phytopathological Society. The full-color publication covers all aspects of fungicide use, including different modes of action, how to use them in various crops and ways for farmers to test efficacy through their own on-farm trials.

"Producers are much more aware of the benefits of fungicides in field crop production, and they’re very interested in trying them," says Kiersten Wise, Purdue Extension plant pathologist and one of the publication’s editors. "With the giant increase in the interest in fungicides, we thought this would be a good resource to help provide those producers with the information they need."

The guide is $19 and can be ordered online through Purdue Extension at Search  at the top for ID-455.

Grain Moisture

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