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- W2069023133 abstract "Native eucalypt forests in the foothills of eastern Victoria, Australia, are being managed for sustained production of hardwood timbers on at least 80-year rotations. The likely effects of intensive harvesting on soil phosphorus reserves were investigated. Distribution of P in a mixed eucalypt ecosystem was determined and removals in sawlogs and residual roundwood were estimated. Availability of soil P was studied in detail by determining fluoride, acid-soluble and organic forms, plus P adsorption isotherms and P levels following sequential extractions under optimal soil: water ratios and extraction times. The above-ground biomass had a P content of 21.2 kg ha−1, and removals of P in harvesting were estimated to range from 1.5–3.0 kg ha−1, depending on harvesting intesting intensity. It was estimated that a further 8 kg P ha−1 would have been lost by burning logging residue to prepare a seedbed for natural regeneration. Soil phosphorus available for long-term forest growth was estimated to be 57 kg ha−1 based on results of sequential soil extractions under optimal conditions. This is a new approach to estimating long-term available P in forests, and we have described this estimate by the term ‘forest-accessible phosphorus’. The combined losses from harvesting and burning represented 18% of the forest-accessible phosphorus. On this basis it was concluded that these eucalypt ecosystems could be intensively harvested for at least five rotations before a measurable change in site productivity would be detected as a result of P depletion." @default.
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- W2069023133 date "1990-09-01" @default.
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- W2069023133 title "Harvesting effects on phosphorus availability in a mixed eucalypt ecosystem in southeastern Australia" @default.
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- W2069023133 doi "https://doi.org/10.1016/0378-1127(90)90022-4" @default.
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