"Something had to be grown in rotation with corn." Scott Jackson, professor of plant genetics at Purdue University.
VOA: standard.2010.02.01
He says the soil is worn out, partially due to poor crop rotation.
VOA: standard.2010.04.01
The vote was seen as a major setback for Mr.Topolanek as it came just days before a planned visit by United States President Barack Obama and midway through the rotation of the Czech Republic's European Union presidency.
VOA: standard.2009.03.25
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