L.B. ROBINSON

Wollongbar Agricultural Institute, Wollongbar, New South Wales, Australia

Abstract

The effect of a three year old flooded gum (Eucalyptus grandis) plantation on the growth of rhodes grass was measured at Samford in southeast Queensland. Soil moisture and photosynthetically active radiation (PAR) levels were monitored.
During the productive early autumn period the growth of pasture was severely depressed by the trees. A clear relationship existed between PAR receipt and pasture production. During late autumn and winter, when growth was slower, pasture production was no different between the boundary of the plantation and in the open paddock. The pasture close to the trees was apparently protected from frosts, which occurred in the open paddock.