Untypical ageing off-flavor due to long-term nitrogen fertilization
This article might not bring us all the answers, but it is useful to familiarize ourselves with a not-so-common defect of white wines - "untypical ageing" or UTA.
The original text does not seem to be available for download from the Vitis website (seventh from the top): http://www.bafz.de/baz2006V4/index.php?id=551