%A Henrik Hauggaard-Nielsen %A Per Ambus %A Nadine Brisson %A Yves Crozat %A Christoph Dahlmann %A Audrey Dibet %A Peter von Fragstein und Niemsdorff %A Mike Gooding %A Elena Kasyanova %A Marie Launay %A Michele Monti %A Aurelio Pristeri %A Erik Steen Jensen %T Pea-barley intercrops use nitrogen sources 20-30% more efficiently than the sole crops %X Field pea (Pisum sativum L.) and spring barley (Hordeum vulgare L) were intercropped and sole cropped to compare the effects of crop diversity on the use of nitrogen sources in European organic crop-ping systems. Across a wide range of growing condi-tions pea-barley intercropping showed that nitrogen sources were used from 17 to 31% more efficiently by the intercrop than by the sole crops. Intercropping technologies offers the opportunity for organic cropping systems to utilize N complementarity between component crops, without compromising total crop N yield levels %D 2006 %L orgprints7487