Eucalyptus regnans F. Muell

Polglase, P.J., Attiwill, P.M. and Adams, M.A. (1992) Nitrogen and phosphorus cycling in relation to stand age of Eucalyptus regnans F. Muell. III. Labile inorganic and organic P, phosphatase activity and P availability. Plant and Soil 142,... 

In studies of the decomposition of sawdusts in soils at 78°F., McKenzie (1958) observed that the maximum amounts of nitrogen taken up by mountain ash (Eucalyptus regnans F. Muell), red ironbark (Eucalyptus sideroxylon A. Cunn) and radiata pine (Pinus radiata D. Don) were 1.6, 1.4 and 1.0% respectively. He states that it is possible that these amounts are inversely related to degree of lignification of the wood, and this would account for softwoods causing less uptake than eucalypts, and a dense eucalypt less uptake than a less dense one. Maximum uptake was reached in 5-11 weeks and the immobilized nitrogen was released very slowly over a period of many weeks. 

Infrared spectra in the O—H and C=0 stretching regions of lignin model compounds and of lignins isolated in various ways from Eucalyptus regnans F. Muell. 

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