Simultaneous Measurement of NH4+ Absorption and N2 Fixation by Glycine max L. 1: RESPONSE TO TEMPERATURE, pH, AND EXTERNAL NITROGEN CONCENTRATION

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RESUMO

Ammonium absorption rates by intact nodulated and unnodulated soybean plants (Glycine max [L.] Merr., Amsoy 71) were determined from the liquid phase of a mist assay chamber. From the gas phase, simultaneous measurements of acetylene reduction rates were made from nodulated plants. Ammonium absorption capacity was consistently greater in unnodulated plants.

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