00821nam a2200181   450000500170000000600040001700700040002100800040002502000150002905000200004410000260006424501160009026001290020630000190033544000410035450502150039565000290061020170901154703.0000000000  a9287116288  aS623b.B58 1988  aH . Winfried E.d1988  aProblems of soil conservation :bStudy on the effects of global and local impacts on soils /cWinfred E.H.Blum.  aStrasbourg ,Europe .bSteering Comittee for the Conservation and Management of the Environment and Natural Habitatscc 1988.  a62p . :bill .  aNature and Environment SeriesnNo 39  aStudy on the effects of global and local impacts on soils,with special reference to soil erosion,soil acidification, soil pollution by heavy metals and soil over- consumption through infrustructural development  aAgriculturevAgriculture