00943nam a2200373 a 450000100080000000500110000800800410001902000150006010000190007524500400009426000480013430000100018265000190019265000220021165000170023365000180025065000170026865000260028565000120031165000190032365300240034265300120036665300190037865300200039765300090041765300230042665300180044965300140046765300180048165300160049965300150051565300200053070000190055010123512012-09-14       1985    bl uuuu      00u1 u    #d  a08911808771 aFOLLETT, R. F.  aSoil erosion and crop productivity.  aMadison: American Society of Agronomyc1985  a533p.  aorganic matter  asoil conservation  asoil erosion  awater erosion  awind erosion  aConservação do Solo  aErosão  aPlantio Direto  aConservation policy  aControl  aDegraded soils  aEconomic models  aEPIC  aErosion prediction  aErosion rates  aFertility  aLand resorces  aRestoration  aSimulation  aTillage systems1 aSTEWART, B. A.