00651nam a2200241 a 450000100080000000500110000800800410001910000160006024500690007626000600014530000090020565000240021465000120023865000230025065000250027365000080029865000270030665000090033365000130034265000150035570000190037070000200038910004222014-02-22       1992    bl uuuu     u00u1 u    #d1 aWELLS, K.L.  aCurrent viewpoints on the use of soil Nitrate tests in the South  aMadison, Wiscounsin: American Society of Agronomyc1992  a51p.  aABONOS NITROGENADOS  aALGODON  aANALISIS DEL SUELO  aAPLICACION DE ABONOS  aEUA  aFACTORES DE PRODUCCION  aMAIZ  aNITRATOS  aTENDENCIAS1 aTHOMPSON, W.R.1 aMICKELSON, S.H.