Story: Superphosphate

Reactive rock phosphate fertiliser

Reactive rock phosphate fertiliser

Reactive rock phosphate consists of very fine particles and looks much like fine beach sand. It can be applied directly to pasture as a fertiliser. There is a direct reaction with acids in the soil – phosphate is slowly released and taken up by the pasture. The rock phosphate used to make superphosphate is too hard for this reaction to release enough phosphate.

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How to cite this page:

Arthur Duncan, 'Superphosphate - Superphosphate pros and cons', Te Ara - the Encyclopedia of New Zealand, (accessed 26 June 2022)

Story by Arthur Duncan, published 24 Nov 2008