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Showing posts from August, 2004

Harvesting lodged corn

Dale R. Hicks, University of Minnesota
(revised Sept 1)
We talked about harvesting the wind lodged corn in southwest MN at meetings in Luverne and Adrian and discussed harvesting in one direction and leaving one row unit empty to guide the combine. I have learned a lot about harvesting down corn since then and thought the information might be useful to those with down corn.

Harvesting immature corn and soybeans for forage after a killing frost

Paul Peterson, Jim Linn, and Dale Hicks, University of Minnesota Extension Service
Frost touched much of the state's corn and soybean acreage this past weekend. The degree to which the frost was a killing frost varies considerably, but a complete killing frost appears to have been the exception, not the rule. Where frost injury occurred without complete kill, it is too early to consider forage harvest because additional yield and forage quality accumulation is likely from surviving plant parts. However, where these crops were/are completely killed by frost before reaching optimum grain or even forage harvest maturity, harvesting as forage is a viable option. In addition, based on the delayed maturation of corn and soybeans to date, chances are good that there will many acres of these crops that will receive a killing frost before reaching maturity, so harvest as forage may still be one of the better options as the growing season plays out.

Drying, handling, & storing wet, immature, & frost-damaged corn

Bill Wilcke, Extension Engineer
Unusually cool growing season weather and early frosts can lead to wet, immature, and frost-damaged corn. This publication describes some of the harvest conditions you can expect after a cold, short growing season and some possible steps to deal with the crops that result from such a growing season.

Early Frost: How common historically and did it end the growing season for some?

Mark Seeley, Extension Climatologist, University of Minnesota
On three consecutive mornings, August 19-21, record or near record low temperatures were reported around Minnesota. Some resulted in damaging ground frosts, while others resulted in a hard freeze, all but ending the growing season for some crops.

Frost on corn and soybeans

Dale R. Hicks, Department of Agronomy and Plant Genetics, University of Minnesota
The growing season continues to be abnormally cold and now the cool temperatures of August 21 have caused frost injury to crops in Minnesota. This report gives an assessment of what I think is the situation.

Damage ranges from all leaves killed on plants completely to the ground in some low areas to very little, if any injury, in other areas or parts of fields. The typical injury for soybeans is only the top leaves killed. For fields that were canopied over, only the top leaves are affected. For fields that were not canopied over, the leaf injury is on the sides and tops of the rows. Typical injury for corn is the top 2 to 4 leaves killed or partially killed.

Corn Lodging - What Can We Expect?

Dale R. Hicks, Department of Agronomy and Plant Genetics, University of Minnesota
The extreme winds that occurred in southern Minnesota on August 3rd caused corn to lodge badly. Lodged plants will likely yield lower and make harvesting more difficult.

Will the corn straighten up?
Some stalk straightening will occur, but plants will not completely stand erect. Most of the straightening will occur within the next 2 to 4 days. After that, the plants will not grow upright anymore. Most of the straightening will occur near or above the ear position. The plant will be goose necked. And, ears on goose necked plants will be closer to the ground and higher-than-normal harvest losses may occur. Slower harvest speeds will help to reduce the harvest losses. Lodged plants (and usually in a twisted mass) also increase combine operator fatigue during harvest.