| molecular diversity of arbuscular mycorrhizal fungi in onion roots from organic and conventional farming systems in the netherlands. | diversity and colonization levels of naturally occurring arbuscular mycorrhizal fungi (amf) in onion roots were studied to compare organic and conventional farming systems in the netherlands. in 2004, 20 onion fields were sampled in a balanced survey between farming systems and between two regions, namely, zeeland and flevoland. in 2005, nine conventional and ten organic fields were additionally surveyed in flevoland. amf phylotypes were identified by rdna sequencing. all plants were colonized, ... | 2009 | 19301039 |