| In this study, the effect of rake angle of a ripper plough on the draft requirement in a sandy-clay soil was investigated; the study was based on field experiments, laboratory tests and numerical simulation. Field experiments were conducted at the University of Nairobi field station in Upper Kabete, Kenya located at 1o15’S and 36o44’E at an altitude of about 1940 meters above sea level. The soil at the location is a humic Nitisol belonging to the class of sandy-clay. Field experiments featured the Factorial Completely Randomized Block design to eliminate experimental error. The plot was sub-divided into four blocks to eliminate variation due to distance and slope; the treatments were randomly assigned to the blocks and replicated four times.The numerical... |
