TY  - JOUR 
T1  - Bradyrhizobium strain and the 15N natural abundance quantification of biological N2 fixation in soybean
JO  - Scientia Agricola
A1  - Guimarães, Ana Paula
A1  - Morais, Rafael Fiusa de
A1  - Urquiaga, Segundo
A1  - Boddey, Robert Michael
A1  - Alves, Bruno José Rodrigues
SN  - 0103-9016
UL  - 10.1590/S0103-90162008000500011
VL  - 65 
Y1  - 2008
PB  - Brasil 
ER  -