Research to increase the productivity of radiata pine plantations in north east Victoria  1. Establishment report.  F. R. Borschmann and W. Smith.  May 1990.  16pp. (unpubl.)

SUMMARY

This report describes the establishment of a series of four field trials collectively designed to upgrade the silviculture and productivity of radiata pine plantations in north east Victoria.

The first trial is concerned with a comparison of slash retention (chopper rolling) and slash burning for establishment of radiata pine plantations on second-rotation sites. Data are presented showing that there is little difference in cost between the two methods of site preparation up to and including planting.

The second trial is evaluating growth response of young, second-rotation radiata pine to broadcast fertilisation. Eight fertiliser treatments, involving combinations of nitrogen, phosphorus, sulphur and boron, are being tested.

A third trial has been established as a demonstration of different planting techniques for steep, second-rotation sites. The techniques being compared are notched, pit and positive pull up planting.

The fourth trial compares the survival and early growth in a frost environment of radiata pine cuttings grown in a maritime environment. Cuttings from Yarram and Rennick are being compared with seedlings raised at Benalla.

The four trials will be intensively monitored over the next two years. The research program is overseen by the North East R & D Action Group comprising staff from three adjoining DCE Regions together with relevant research and policy staff from the Lands and Forests Division.