00361naa a2200121 a 450000100080000000500110000800800410001910000190006024500880007926000090016770000200017677300430019616140521995-06-27       1990    bl uuuu     u00u1 u    #d1 aCERRATO, M. E.  aRelationships between grain nitrogen concentrations and the nitrogn status of corn.  c19901 aBLACKMER, A. M.  tAgron. J.gv.82, n.4, p.744-749, 1990.