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Extension > Minnesota Crop News > September 2010

Thursday, September 30, 2010

Plan Now for Successful Corn after Alfalfa

By Jeff Coulter, Extension Corn Agronomist

Planting corn after alfalfa is an effective way to eliminate or greatly reduce the corn nitrogen requirement while increasing corn yield potential due to the rotation effect. However, successful termination of the alfalfa stand is essential in order to fully realize these benefits, as volunteer alfalfa can compete with corn for water, nitrogen, and light. Traditionally, alfalfa stand termination relied on tillage implements such as a moldboard plow or a chisel plow with overlapping sweeps to completely cut off alfalfa roots. From a soil conservation standpoint, however, these tillage implements may not be desirable for all fields. Yet, tillage implements that do not cut the roots from all plants are ineffective for complete termination. As a result, herbicides are an indispensable tool for alfalfa stand termination in many cropping systems.

Wednesday, September 29, 2010

Sauk Centre Hay Auction Sept 16, 2010

By Dan Martens, Extension Educator, Stearns - Benton - Morrison Counties
I am attaching my summary of the Sauk Centre Hay Auction held on September 16, 2010.
Click on the link SC Hay Auction 09 16 10.pdf for a document that include all tested lots and bedding materials. The lots are grouped by kind of hay, type of bale, in groups by 25 RFV points. The third page is a history of selected lots. I encourage people to consider the usefulness of averages carefully with small numbers of loads and some significant differences in physical condition.

Flood effects on Minnesota soybeans: 2010 edition

By Seth Naeve and Bruce Potter

Heavy rain fell across much southern Minnesota on September 22nd and 23rd and left large areas of Minnesota corn and soybean fields submerged.  Flood waters covered, perhaps 100,000 acres for several hours as rain water moved from fields into creeks and rivers.  Longer term flooding of fields affected tens of thousands of acres of cropland.  In most instances, drainage tile, where present,  were unable to prevent ponded waters. In other cases, streams swollen by 4–12 inches of rain falling on fields, roads and cities came out of their banks and flooded fields.

Many factors will affect the quality of the corn and soybean crops following standing water.  These include, but are not limited to: duration of the flooding, crop stage or maturity, depth of the water, movement of the water, and air and water temperatures.  Fortunately, late-season rain events of this magnitude are relatively rare.  Unfortunately, there is virtually no data to help us estimate crop losses and conditions of corn and soybean crops.  Flood waters are thought to affect soybeans more than corn, and will therefore be the focus of this piece.

Wednesday, September 15, 2010

Sauk Centre Hay Auction Results 09/02/2010

By Dan Martens, Extension Educator, Stearns-Benton-Morrison Counties
This information is from the Sauk Centre Hay Auction held on September 2, 2010.

Click on the link SC Hay Auction 09 02 10.pdf for a list of all tested lots sold and bedding materials sold. The lots are grouped by kind of hay, type of bale, in groups by 25 RFV points. The last page of the report is a history of selected groups with averages and ranges from previous years along with corresponding September 2, 2010 information.

Friday, September 10, 2010

Hot and dry summer conditions in Minnesota are favorable for corn ear rots and mycotoxin production

Dean Malvick, Extension Plant Pathologist

Not only have the hot and dry conditions and hail affected corn yields in Minnesota this year, these conditions have also favored development of ear rots. Reports of ear rots have been coming in from several different areas, and the quality of grain that comes off these affected fields may be reduced. Several different types of ear rots occur in Minnesota, and all are not equally important. Aspergillus ear rot and Fusarium ear rot may be of particular importance this year due to the hot and dry conditions in much of Minnesota.
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