Stock Photo - PRODUCTION - 25 September 2023, Baden-Württemberg, Karlsruhe: Christoph Weinert, nutritionist at the Max Rubner Institute (MRI), looks at onion pieces of the Hytech F1 variety that have been snap-frozen using liquid nitrogen. This serves to stop the metabolism. In the so-called Onion L project, onion landraces and hybrid varieties are to be directly compared at the institute with regard to their suitability for organic farming. Photo: Uli Deck/dpa. - Karlsruhe/Baden-Württemberg/Germany

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