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Invasive alien trees and water resources in South Africa: case studies of the costs and benefits of management

Le Maitre, David C; Van Wilgen, BW; Gelderblom, CM; Bailey, C; Chapman, RA; Nel, JA (Elsevier Science BV., 2002-05-01)
-up) for each of the species and sub- divided into three density classes: light (0?25%), medium (25?50%) and dense (>50%) cover (Le Maitre et al., 2000). Species-specific data were pre- ferred because the cost often differs markedly between species: for example...

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