Underplanting of silviculturally treated rainforest in north Queensland.
Trials were carried out using various combinations of 23 species at 11 sites on various soil types. Acceptable growth rates were obtained with Flindersia brayleyana, F. bourjotiana, F. pimenteliana, F. schottiana, Toona australis, Araucaria cunninghamii, Agathis robusta, Swietenia macrophylla and Khaya ivorensis. Underplanting with these species could increase the yield of high quality timber substantially, but is not currently economic. Planting in gaps created during logging with no other silvicultural operations would require a 10-fold increase in timber value to become economic. From authors' summary.