Woody overstorey and herbaceous understorey biomass in Acacia harpophylla (brigalow) woodlands [Queensland]
1991
Scanlan, J.C. (Queensland Dept. of Primary Industries, Charters Towers (Australia))
Based on analysis of 29 A. harpophylla stems, biomass component regressions were developed using tree basal area as the predictor variable and used to estimate component yields of regrowing A. harpophylla communities. Leaf biomass of A. harpophylla reached a maximum of 12 t per ha with a leaf area index of 2.5 when regrowing plants were 2.5 m high and about 10 years old. Pasture production, pasture basal area and the proportion of sown pasture species were lower at higher tree basal area. A density of 1000 plants per ha is a threshold value above which regrowth herbicide control would be necessary to maintain acceptable pasture production and composition.
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