01170naa a2200193 a 450000100080000000500110000800800410001910000120006024501080007226000090018052006400018965000180082965000120084765000190085965000090087865300240088765300260091177300390093719759962014-01-14       1976    bl ---       0--  u    #d1 aLAL, R.  aSoil erosion on alfisols in western Nigeria, I. effects of slope, crop rotation and residue management.  c1976  aThe effect of slope, crop rotation and residue management on runoff and soil loss was investigated using field runoff plots of 25 m x 4 m on natural slopes of 1, 5, 10 and 15% on an Alfisol on the International Institute of Tropical Agriculture (IITA) research site near Ibadan, Nigeria. The soil and crop management treatments consisted of conventionally plowed bare fallow, maize (conventionally plowed and mulched), maize-maize (conventionally plowed), maize-cowpeas (zero-tillage), and cowpeas-maize (conventionally plowed). The effect of two contour lengths of 12.5 and 37.5 m was also investigated for the maize-cowpeas rotation.  aConservação  aErosão  aPlantio Direto  aSolo  aManejo de resíduos  aRotação de culturas  tGeodermagv. 16, p. 363-375, 1976.