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Tribal advocates keep up legal pressure for fair political maps; 12-member jury sworn in for Trump's historic criminal trial; Healthcare decision planning important for CT residents; Debt dilemma poll: Hoosiers wrestle with college costs.

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Civil Rights activists say a court ruling could end the right to protest in three southern states, a federal judge lets January 6th lawsuits proceed against former President Trump and police arrest dozens at a Columbia University Gaza protest.

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Rural Wyoming needs more vocational teachers to sustain its workforce pipeline, Ohio environmental advocates fear harm from a proposal to open 40-thousand forest acres to fracking and rural communities build bike trail systems to promote nature, boost the economy.

New ISU Research: 3-Year Crop Rotation Works Best

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Tuesday, September 13, 2011   

DES MOINES, Iowa - 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.

Farmers can see Liebman's research for themselves today beginning at 10 a.m. at the ISU Agronomy Farm. The Agronomy Farm is in Boone County, on U.S. Hwy. 30 between U and V Avenues.




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