00747nam a2200265 a 450000100080000000500110000800800410001910000200006024500660008026000590014630000080020549000540021365000190026765000120028665000240029865000260032265300150034865300120036365300210037570000160039670000170041270000180042970000160044770000180046312968511999-03-29       1990    bl uuuu      00u1 u    #d1 aWILLIAMS, J. R.  aEPIC - erosion/productivity impact calculatorb2.user manual.  aSpringfield: USDA. Agricultural Research Servicec1990  av.2  a(USDA. Agric. Res. Serv. Tech. Bull., 1768).vv.2  asoil fertility  aErosão  aFertilidade do Solo  aModelo de Simulação  aEpic model  aErosion  aModel simulation1 aDYKE, P. T.1 aFUCHS, W. W.1 aBENSON, V. W.1 aRICE, O. W.1 aTAYLOR, E. D.