"Kvælstofcyklus" . . "University of Groningen. Department of Plant Physiology" . . "Jordbundens fysisk-kemiske egenskaber" . . "Nitrates" . . "Carbon." . . "Carbon" . "Rijksuniversiteit, Gronigen. Vakgroep plantenfysiologie." . . "Nitrogen metabolism" . . "Plants, effect of nitrogen on." . . "Nitrogen." . . "Nitrogen" . "Planter" . . "Kulstof" . . "Plants." . . "Plants" . "Carbone Métabolisme Congrès." . . "Laboratorium voor Plantenfysiologie. <Groningen>." . . "Accumulation" . . "Akkumulering" . . "Kongres" . . "Plantes Métabolisme Congrès." . . "Nitrater" . . . "Uptake and translocation of nitrogen; Biochemical aspects; Interactions between C and N metabolism; Ecological aspects; Agricultural aspects; The nitrogen ballade." . . . . . . . . . . . . . . . . . . . . "Fundamental, ecological, and agricultural aspects of nitrogen metabolism in higher plants proceedings of a symposium"@en . . . . . . . . . . . . "Fundamental, ecological and agricultural aspects of nitrogen metabolism in higher plants : proceedings of a symposium organized by the Department of plant physiology, University of Groningen and the Institute for soil fertility, Haren, 9-12 April 1985" . "Fundamental, ecological and agricultural aspects of nitrogen metabolism in higher plants : proceedings of a symposium organized by the Department of Plant Physiology, University of Groningen and the Institute for Soil Fertility, Haren, 9-12 April 1985" . . . . . . "Fundamental, ecological, and agricultural aspects of nitrogen metabolism in higher plants : proceedings of a symposium organized by the Department of Plant Physiology, University of Groningen and the Institute for Soil Fertility, Haren, 9-12 April 1985" . "Fundamental, Ecological and Agricultural Aspects of Nitrogen Metabolism in Higher Plants Proceedings of a symposium organized by the Department of Plant Physiology, University of Groningen and the Institute for Soil Fertility, Haren, 9-12 April 1985"@en . . . . . . . . . . . . . . . . . . . . "Fundamental, ecological and agricultural aspects of nitrogen metabolism in higher plants" . "Electronic books"@en . . . . . . . . "Fundamental, ecological and agricultural aspects of nitrogen metabolism in higher plants : proceedings of a symposium" . . . . . "Proceedings of a Symposium organised by the Dept. of Plant Physiology, University of Groningen and the Institute for Soil Fertility, Haren, The Netherlands, April 9-12, 1985"@en . . . . . . "Fundamental, ecological and agricultural aspects of nitrogen metabolism in higher plants : proceedings of a symposium organized by the Department of plant physiology, University of Groningen and the Institute for soil fertility : Haren, 9-12 April 1985" . . . . "Conference papers and proceedings"@en . "Conference papers and proceedings" . . . . "Fundamental, ecological, and agricultural aspects of nitrogen metabolism in higher plants : proceedings of a symposium" . . . . . . "Kvælstofbinding" . . "Nutrient uptake" . . "Soil chemicophysical properties" . . "Næringsoptagelse" . . "Nitrogen fixation" . . "Instituut voor Bodemvruchtbaarheid (Pays-Bas)" . . "Samenpflanzen." . . "Congressi - Haren - 1986." . . "Stickstoffstoffwechsel." . . . . "Azote Fixation Congrès." . . "Congress" . . "Kvælstof" . . "Plantes, Effets de l'azote sur les Congrès." . . "Piante - Metabolismo dell'azoto - Congressi - 1985." . . "Soil chemistry" . . "Institute for Soil Fertility" . . "Azote Métabolisme Congrès." . . "Jordbundskemi" . .