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August 15, 2012     Sentinel Tribune
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August 15, 2012
 

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SENTINEL TRIBUNE I00REA Focus Wednesday, August 15, 2012 Page 10 2. " 1:" to School Left: First grade teacher Kelly Quade got as:sis- tance from Hadley Jenniges daughter of Derek and Ann Jenniges of Walnut Grove Left: Spanish teacher Candace Duerksen was busy preparing her room in the high school for classes starting next Monday morning. Using Drought-Stressed Corn for Forage By Lizabeth Stahl Extension Educator in Crops Drought conditions continue to intensify in areas across the state including Southwestern Minnesota. According to the July 24, 2012, U.S. Drought Monitor report, the southwest corner of the state is now rated in the "Severe" drought category. The western half and southern counties of the state are also rated as "Abnormally Dry" or in the "Moderate" to "Severe" drought categories, and throughout this area soil moisture levels are low. For example at the U of MN Southwest Research and Outreach Center in Lamberton, soil mois- ture levels are less than half the historic aver- age for this time of year, and what moisture remains is almost all at a depth of more than 3 feet. In areas hardest hit by the drought, growers are assessing grain yield potential and if or when to harvest drought-stressed corn for forage. At this time there is still a significant amount of corn where pollination was suc- cessful and plant tissue is green. With ade- quate moisture, these plants will be able to continue photosynthesizing, and kernel devel- opment will continue. Continued drought stress, however, will lead to increased kernel abortion and reduced yield potential. Yield potential is also reduced where plant tissue has bleached or turned brown prematurely due to drought, as the photosynthetic capacity of the plant has been irreversibly reduced. In areas most affected by the drought, growers are reporting barren plants with little green tissue remaining. If kernel growth is occurring and green leaf tissue remains, waiting to harvest will allow more dry matter accumulation in the grain, resulting in increased forage yield and quality. If the plant is barren or dead, plants should be harvested when the correct moisture for stor- age is reached. Nitrate toxicity is a concern when drought- stressed corn is harvested for forage as nitrates can accumulate in drought-stressed, barren plants. Because of this, green chopping or grazing should only be considered if emer- gency feed is needed. Ensiling is preferred as this process can reduce forage nitrate levels by 33 to 50%. Cutting height also influences the amount of nitrates in the forage. Testing the forage for nitrate levels and nutritive value for livestock before feeding is recommended. The article "Using Drought-Stressed Corn for Forage" (Hicks and Peterson, 2006, U of MN Extension) is an excellent resource for those planning to use drought-damaged corn for forage: http://www.extension.umn.edu/ cropenews/2006/06MNCN42.htm. If you are considering stacking or baling drought-damaged corn as dry stover, it should be dried to 20 percent moisture or less to avoid spoilage in storage and should be har- vested before excessive leaf loss occurs, according to Stephen Barnhart, ISU Extension Forage Agronomist. Testing for nitrate levels is also recommended as high nitrates can be a concern if drought-stressed corn is harvested for stover. Before harvesting drought-stressed corn for forage or stover, be sure to check the labels of any pesticides used in the crop, including all herbicides, fungicides, and/or insecticides applied, to be sure you are following pre-har- vest interval or grazing restrictions listed for the products. Also be sure to contact your crop insurance agent before harvesting, or before any changes are made in care of the crop. For further farm-related resources and information related to the drought of 2012, refer to the U of MN Extension Drought web- site at: http://www.extension.umn.edu/ extreme-weather/drought-fire/farm/. Subscribe to the Sentinel Tribune Commerci%' Residential Geothermal Syste"-" Farm 708 5th St. I Westbrook, MN 507-274-5650 Muske, Muske & Suhrhoff Law Office Call Maryellen Suhrhoff 507-274-5980 611 First Ave Westbrook, MN Wednesday afiemoons or by appointment or call the Windom office 507-831-5575 i): Cindy M. Jensen Cer tiffed Public Accountant Phone: (507)831-0227 Fax number: (507)831-5740 .187575 BUS: (5071) 5371526 1-658-2455 Plum Creek Embroidery Hwy. 14. Walnut Grove Kris & Randy Tietz, owners Hats. Jackets. 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