Before the days of hormone sprays, a solution of sodium chlorate was sprayed onto weeds such as blackberry and ragwort. Here a small, two-stroke petrol motor powers a spray unit on the back of a truck used to control roadside weeds.
Te whakamahi i tēnei tūemi
Archives New Zealand - Te Rua Mahara o te Kāwanatanga
Reference: AANR 6329 24 DA 31,830
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