“…Thus, for example, for manual weeding of an unpaved shoulder, an effort level of 0.5, 1.0, or 2.0 could be defined for each square meter of unpaved shoulder, which is equivalent to weeding once every two years, once a year or twice a year respectively by applying the three exemplified rates. It is also evident, on the other hand, that the higher the level of effort applied, the higher the level of quality achieved (Gaussmann et al, 2020).…”