The data that did exist were frequently
based on perceptions and observations over relatively short time periods (Gilmour,
1991), usually with a western, developed perspective, and were often contradictory
and fraught with uncertainty (Thompson & Warburton, 1985). In terms of soil erosion,
the paucity of data relating to rates, timing and processes was highlighted.
Thus, most studies concluded that there was a clear need to evaluate carefully the
ways by which human activity may be causing accelerated soil erosion through
changing land use, land cover and land management practices.