The plant nutrient status of granite soils from the Bendemeer area of New South Wales

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Abstract
A factorial glasshouse pot trial was used to examine the supply of phosphorus, boron, zinc, copper, cobalt, magnesium, molybdenum, potassium, and manganese, to the Dwalganup strain of Trifolium subterraneum L. growing in virgin granite soils from Bendemeer, New South Wales. Calcium sulphate was applied as a basal nutrient. Significant dry matter responses were obtained on all four virgin soils to the application of phosphorus, molybdenum, and potassium; to copper on two soils; and to boron and cobalt on one soil. Phosphorus was so deficient that responses to other plant nutrients did not occur in its absence. On all soils, significant first order interactions were recorded between phosphorus and other deficient elements. In addition, significant interactions were recorded between molybdenum and magnesium, copper and molybdenum, boron and molybdenum, copper and cobalt, and potassium and molybdenum.

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