History of aerial topdressing in New Zealand

Aerial topdressing is the spreading of fertilisers such as superphosphate over farmland with the use of aircraft. Aerial topdressing was developed in New Zealand in the 1940s and was rapidly adopted elsewhere in the 1950s. The first known aerial application of agricultural materials was by John Chaytor, who in 1906 spread seed over a swamped valley floor in Wairoa, New...
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