Alan L. Presbitero and Vincent Christian Quimbo
The effect of percent slopes on the erosion coefficient of Umingan, Maasin and Malitbog clays was found to be highly significant. For all the soil types, erosion coefficient had a positive relationship with the slope. Third degree polynomial equations described the slope-erosion coefficient relationship for Umingan and Malitbog clays, and quadratic equation for Maasin clay.
Umingon clay had the highest erosion coefficient at all slope levels, i.e. from 2.5 to 50% at an increment of 2.5%, while Malitbog clay had a higher coefficient than Maasin clay only at slope >17%.
Keywords: Erosion coefficient.
Annals of Tropical Research 13 (1-4):(1991)