The residual value of a sulphatic fertilizer applied to a basaltic soil

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Abstract
Yield responses d a native pasture on a basaltic soil near Willow Tree, New South Wales, were measured in the second, fourth, and seventh years after the application of several rates of calcium sulphate in the first year. The value of the residues declined sharply at first and then more slowly. Fifty per cent of the potential response by the legumes (the responsive component of the pasture) was achieved by an application of 7lb of sulphur an acre in the first year ; residues from an application of 20 lb of sulphur an acre were required in the second year, and from 48 lb S of sulphur an acre in the fourth year, to obtain the equivalent responses. By the seventh year, effects were too small to allow the derivation of a comparable figure.

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