In the present study we adopted a systematic isolation approach to obtain strains by isolating rhizobia from every nodule on the sample plants.Out of 154strains studied,100 were from 10 plants collected in the same field(designated as group A),40 were fro
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邹向宏 曹燕珍. STUDY ON IAR AND PLASMID PATTERNS OF RHIZOBIA ISOLATED FROM NODULES OF ASTRAGALUS SINICUS[J]. Jorunal of Huazhong Agricultural University,1994,13(4).