hoop pine


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hoop pine

a fast-growing timber tree of Australia, Araucaria cunninghamii, having rough bark with hoop-like cracks around the trunk and branches: family Araucariaceae
References in periodicals archive ?
Soil C and N concentrations under hoop pine plantations were almost uniformly distributed across all 4 aggregate fractions (Fig.
05) higher under pasture and rainforest than the 25- and 63-year hoop pine plantations, and rainforest iPOM content was higher than the 50-year hoop pine plantation (Table 1).
Soil under the 63-year hoop pine plantation had significantly (P<0.
d] ratio was strongly and positively correlated with total soil C at all sites except the 25-year hoop pine plantation (Fig.
3 m under most hoop pine plantations, compared with rainforest and pasture.
The greater concentration of iPOM under pasture and rainforest indicates that SOC is protected to a greater extent within aggregates than in the hoop pine soils, which are dominated by C associated with silt- and clay-sized particles (<53 [micro]m).
If this is also the case for plantations, then it appears that hoop pine soils, with greater proportions of total C in imSOC fractions, are dominated by a pool of old stabilised C protected by silt- and clay-sized particles, whereas physical protection of SOC in larger aggregates may not be an important mechanism for SOC stabilisation.
The greater storage of C within aggregates in pasture and rainforest soil, compared with hoop pine plantations, may be due to different root characteristics.
Mathers NJ, Xu ZH, Blumfield TJ, Berners-Price SJ, Saffigna PG (2002) Composition and quality of harvest residues and soil organic matter under windrow residue management in young hoop pine plantations as revealed by solid-state [sup.
15]N-labelled nitrate in winter under windrowed harvesting residues in hoop pine plantations of 1-3 years old in subtropical Australia.