00448naa a2200157 a 450000100080000000500110000800800410001910000170006024500910007726000090016865300090017765300100018665300120019665300150020877300670022310436922006-03-27       1978    bl ---       0--  u    #d1 aHUANG, C. Y.  aEffects of nitrogen fixing activity of blue- green algae on the  yield of rice plants.  c1978  aAlga  aArroz  aFixacao  aNitrogenio  tBot. Bulletin of Academia Sinicagv. 19, n. 1, p. 41-52, 1978.