Soil erosion assessment at the Udi-Nsukka Cuesta (southeastern Nigeria)

agriculteur agricultores alomado anacardium occidentale anacardo billonnage bosques cashews cropping systems elaeis elemento primario del suelo erosion escorrentia farmers forests infiltration land use nigeria noix de cajou oil palms palmas oleaginosas ridging rill erosion ruissellement runoff secuencia de suelos sistemas de cultivo soil parent materials soil sequences topografia topographie topography universal soil loss equation utilisation des terres water erosion