The widespread transition of grasslands and savannas to shrub-lands during the last 50-100 years has elicited significant debate concerning the causes of these changes and has given rise to a number of investigations. Often the encroaching species suppress the growth of palatable grasses and herbs, as they grow into impenetrable thickets.
Reference:
Dube, S, Oluwole, FA, and Lesoli, MS. 2011. Impacts, efficacy and economics of Bushwacker Sc (Bromacil) In controlling Acacia invasion in South Africa. Herbicides and Environment, In Tech Publishing, January 2011
Dube, S., Oluwole, F., & Lesoli, M. (2011). Impacts, efficacy and economics of Bushwacker Sc (Bromacil) In controlling Acacia invasion in South Africa., Workflow request;5545 InTechOpen. http://hdl.handle.net/10204/4901
Dube, S, FA Oluwole, and MS Lesoli. "Impacts, efficacy and economics of Bushwacker Sc (Bromacil) In controlling Acacia invasion in South Africa" In WORKFLOW REQUEST;5545, n.p.: InTechOpen. 2011. http://hdl.handle.net/10204/4901.
Dube S, Oluwole F, Lesoli M. Impacts, efficacy and economics of Bushwacker Sc (Bromacil) In controlling Acacia invasion in South Africa.. Workflow request;5545. [place unknown]: InTechOpen; 2011. [cited yyyy month dd]. http://hdl.handle.net/10204/4901.