Sustainable bush removal is calculated on a Tree Equivalent (TE) or Evapotranspiration Tree Equivalent (ETTE) basis. Based on local research a “rule of thumb” stipulates that the median ETTE/ha and TE/ha that can be supported in a specific rainfall region without adversely affecting the grass layer should not exceed 10 and 1.5 times the mean annual rainfall respectively.
Simply put, on average across the central bush encroached region of Namibia, this translates to roughly 30-50% tree and bush coverage, increasing as the average annual rainfall increases in a north-easterly direction.
The bush species that are cut back are mainly Acacia mellifera, A. reficiens, A erubescens, A. fleckii and Dichrostachys cineria.
The bush harvesting staff are equipped with protective clothing and paid at above market hourly rates.