00651nam a2200205Ia 4500001001000000003000500010008004100015010001100056040000900067082001900076100001900095245010600114260005200220300001500272440005000287500003800337650002500375650001900400650002600419Para_7009CHAP220125s1916    xx            000 0 und d  a205755  cCHAP  aPA-C 631.4 B85  aGreaves, J. E.  aStimulating influence of arsenic upon the nitrogen-fixing organisms of the soil  /c by J. E. Graeves  aUtah  :b Utah. Agricultural Experiment Station  a389-416 p.  aJournal of Agricultural Research : 6(2), 1916  aEnc. con otros impresos similares  aSuelos x análisis  aSuelos x EUA   aSuelos, nitrogeno en