Literature review: Impact of Chilean needle grass ... - Weeds Australia

estoration and, if Australia follows the European path, of extensifying agricultural land back to native grassland to achieve
biodiversity and ecosystem services goals.
Biomass reduction techniques – fire, grazing, cutting and raking, manual removal – shown to have similar effects in removal of
exotic grasses (MacDougall and Turkington 2007).
Nutrient reduction technqiues There is good evidence that the ability of perennial C 4 (such as T. triandra) grasses to outcompete
C 3 grasses (including Nassella spp.) is enhanced under low soil N conditions (Badgery et al. 2002).
Reintroduction of species
MacDougall and Turkington (2007) compared the effects of annual cutting and raking, fire and hand weeding of the dominant
invasive exotics Poa pratensis and Dactylis glomerata, in the restoration of invaded Garry Oak (Quercus garryana) savannah in
British Columbia, unburnt for decades. All treatments significantly increased light levels at the ground surface and the amount of
bare ground, reduced the growth and reproduction of the invasive grasses, and increased native plant cover and flowering. After
four years of summer treatments the cover of P. pratensis and D. glomerata was reduced on average to