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September 19, 2011

New ISU Research: 3-Year Crop Rotation Works Best

Iowa News Service

Des Moines, Iowa — September 13, 2011

Iowa farmers have long used a two-crop rotation to keep the yields up in their fields, but new research at Iowa State University (ISU) indicates they could increase their yields even more by using a third crop in the rotation cycle.

ISU agronomist Matt Liebman says an example is the boost soybeans get from using three crops instead of two.
 "We've seen a gain from 42 bushels an acre in the two-year rotation up to 54 and 55 bushels an acre in the three-year and the four-year rotations."

Liebman says rotation can reduce the impact of "soybean sudden death syndrome (SDS)" and increase weed seed predators. 
"And we get outstanding weed control; that's important now, because we are starting to see resistance to glyphosate."

He says the three-year plan is a corn-soybean-oat and red clover rotation. Essentially, he says, it allows a farmer to "grow his own nitrogen" and reduce having to purchase inputs, which leads to higher profits.

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Crop News
  • NORTHEY COMMENTS ON IOWA CROPS - October 11

    “The dry weather last week helped crops continue to dry down and allowed nearly half of the state’s soybeans to be harvested.  Unfortunately, fire does remain a risk as the dry weather persists, so farmers should continue to take extra care while working in their fields,” Northey said.  “Harvest remains slightly ahead of the five-year average and will likely continue to advance rapidly if conditions remain dry.”

    October 12, 2011

  • Producers are Encouraged to Monitor Grain this Fall

    As harvest begins around the state, farmers are encouraged to be aware of the potential for development of molds and fungus in corn. Recent warnings by Iowa State University (ISU) Extension and Outreach’s Integrated Crop Management (ICM) staff about hail-damaged corn in northwest Iowa help draw attention to the issue, according to ISU Extension swine program specialist Matt Swantek.

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  • Soybean Association Responds to USDA Crop Report

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    For Iowa, production is estimated at 467.6 million bushels, compared to 464.6 million bushels forecast in September. Iowa yield estimates are for an average of 50.5 bushels per acre, down from the September prediction of 51 bushels per acre.

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  • Iowa Soybean Association, Taiwanese delegation sign letter of inten

    On September 30, under the unmistakable gold dome of the Iowa State Capitol, members of the Taiwan Agricultural Goodwill Mission and the Iowa Soybean Association (ISA) signed a letter of intent for the Taiwanese purchase of U.S. soy products.

    October 12, 2011

  • Iowa Soybean Association asks lawmakers’ continued support for strong U.S. agriculture

    The Iowa Soybean Association (ISA) released its Farm Bill Priorities paper on Tuesday, making the point, “U.S. agriculture in general is the brightest spot in the economy.

    October 12, 2011

  • New ISU Research: 3-Year Crop Rotation Works Best

    New research at Iowa State University (ISU) indicates farmers could increase their yields even more by using a third crop in the rotation cycle.

    September 19, 2011

  • IOWA CROPS AND WEATHER REPORT - Sept 19

    “Harvest is just starting to really get underway as farmers wait for the crop to dry down and focus on harvesting fields with wind or hail damaged,” Northey said.

    September 19, 2011

  • Iowa Soybean Association elects officers

    The Iowa Soybean Association recently held its board elections at its September 8 meeting.

    September 19, 2011

  • iowasoybeanassoc.jpg Dan Sneller of Bussey Wins Tool Chest from Iowa Soybean Association

    September 19, 2011 1 Photo

  • Iowa Beef Center at ISU Heat, Drought and Goss’s Wilt Can Affect Corn Yields in Iowa

    Drought stress presents a much bigger potential problem than Goss’s Wilt for livestock producers...  “Nitrate concentration or cyanide concentration in drought-stressed corn can be a serious threat to livestock use,” Steve Ensley said (of Iowa State University’s (ISU) Veterinary Diagnostic and Production Animal Medicine department). “Nitrate is converted to nitrite in the rumen, and nitrite converts blood hemoglobin to methemoglobin, which cannot transport oxygen to body tissues. Cyanide concentration, also known as prussic acid poisoning, works in a similar manner. In both cases, animals often die because of lack of oxygen.”

    September 13, 2011 1 Photo

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