Aarnes, H Accumulation of ammonium in Norway spruce (Picea abies) seedlings measured by in vivo 14N-NMR. [electronic resource] - Journal of experimental botany 2007 - 929-34 p. digital Publication Type: Journal Article ISSN: 0022-0957 Standard No.: 10.1093/jxb/erl247 doi Subjects--Topical Terms: Ammonium Sulfate--metabolismCitric Acid--metabolismHydrogen-Ion ConcentrationMagnetic Resonance SpectroscopyMalates--metabolismNitrates--metabolismNitrogen--metabolismPicea--metabolismPlant Leaves--metabolismPlant Roots--metabolismPlant Stems--metabolismPotassium Compounds--metabolismQuaternary Ammonium Compounds--metabolismSeedlings--metabolism