00840nam a2200325 a 450000100080000000500110000800800410001910000170006024500640007726000510014130000100019265000160020265000120021865000140023065000200024465000160026465000100028065000180029065000130030865000180032165000150033965000240035465000200037865300170039865300240041565300220043970000170046170000180047870000180049615633811999-04-26       1979    bl uuuu      00u1 u    #d1 aLOEHR, R. C.  aBest management practices for agriculture and silviculture.  aAnn Harbor, Michigan: Ann Harbor Sciencec1979  a740p.  aagriculture  aforests  apollution  awater pollution  aAgricultura  aÁgua  aConservação  aFloresta  aMeio Ambiente  aPoluição  aPoluição da Água  aRecurso Natural  aEnvironments  aNature conservation  aNtaural resources1 aHAITH, D. A.1 aWALTER, M. F.1 aMARTIN, C. S.