00627naa a2200193 a 450000100080000000500110000800800410001910000180006024500280007826000060010652002120011265000160032465000150034065000160035565000180037165300180038965300150040777300110042210718941992-08-19               bl ---       0--  u    #d1 aFRANCA, F. H.  aCenter Pivot Injection.  c0  aDefinition of center pivot injection; Adevanges of irrigation injection; Safety equipment needed for center pivot injection; Injection equipment; Irrigation system calibration; Calibration of injection pump.  achemigation  airrigation  aIrrigação  aPivô Central  aCentral pivot  aQuimigacao  ts.n.t.