00507nam a2200181 a 450000100080000000500110000800800410001910000170006024500990007726000350017630000100021149000290022165000170025065000130026765000090028065300160028970000200030512457052003-07-11       2001    bl uuuu     u0uu1 u    #d1 aDOLER, J. C.  aInvestment analysis of commercial variable rate and conventional fertilizer spreading systems.  aMississippi State: MAFESc2001  a19 p.  a(MAFES. Bulletin, 1105).  aFertilizante  aPesquisa  aSolo  aAplicação1 aLAUGHLIN, D. H.