Evidence of land degradation during recent expeditions 30 high grazing density at Letšeng la Letsie. Cattle, sheep, goats, horses and donkeys were observed 31 deep erosion gullies at Koro-Koro. Poor agricultural practices are the primary cause, for example ploughing of fields in the riparian zone (see fields in the background and in figs 11, 12). Scale bar: 1 m (31).