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Press, Volume XCVIII, Issue 29021, 9 October 1959, Page 12 (Supplement)

'T'O replace the minerals taken from the soil through the grass the sheep eat, an intensive topdressing programme is necessary on our farms and the three photographs shown bear a direct relationship to each other. A considerable tonnage of calcium, phosphorus and sulphur is exported each year in our shipments of frozen lamb and wool and this must be replaced if the fertility of the soil is to be maintained. Aerial application of superphosphate has raised production levels on our hill country farms and on the flat bulk spreading trucks such as the one shown below enable fast and efficient topdressing to pastures and cultivated land.