00807naa a2200157 a 450000100080000000500110000800800410001910000170006024500550007726000090013230000120014152003550015365000090050870000200051777301120053721195252025-03-21       1989    bl uuuu     u00u1 u    #d1 aSMYTH, T. J.  aPhosphorus fertilizer placement and profitability.  c1989  ap. 149.  aThe effects of P fertilizer placement methods were investigated during eight consecutive crops of a corn-cowpea annual rotation. Treatments included comparisons between rates of broadcast P (0, 22, 44, 88 and 176 kg/ha) applied before the initial corn-crop, in factorial combination with banded P rates (0, 11, 22 and 44 kg/ha), applied to each crop.  aSolo1 aCRAVO, M. da S.  tIn: CAUDLE, N. (ed.). Tropsoils technical report 1986-1987. Raleigh: North Carolina State University, 1989.