00673naa a2200217 a 450000100080000000500110000800800410001910000150006024501750007526000090025065000160025965000120027565000090028765300080029665300240030465300250032865300080035370000210036170000190038277300540040116177251995-06-27       1993    bl uuuu     u00u1 u    #d1 aGEORGE, T.  aThe use of nitrogen-15 natural abundance and nitrogen yield of non-nodulating isolines to estimate nitrogen fixation by soybeans (Glycine max L.) across three elevations.  c1993  aGlycine Max  aMétodo  aSoja  a15N  aAbundância natural  aDiulição isotopica  aFBN1 aSINGLETON, P. W.1 aVAN KESSEL, C.  tBiol. Fertil. Soilsgv. 15, n. 2, p. 81-86, 1993.