Response of radiata pine at Fingal, Tasmania, to aerial fertilisation

Abstract
The application of superphosphate or rockphosphate to seven- to ten-year-old plantations of Pinus radiata at Fingal, Tasmania, has resulted in improved health and increased growth. Foliar levels of phosphorus and calcium were higher in the fertilised stands, and in many cases foliar levels of potassium, nitrogen and copper also increased. The growth of stands at Fingal, receiving superphosphate and rockphosphate, is still, however, slow compared with other plantation areas of Tasmania and this is attributed to factors, such as drought, which have not yet been elucidated. Applications of urea subsequent to establishment at Fingal has caused only a transient increase in foliar nitrogen levels and has had no effects on growth or health of trees.

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