Eighty per cent of the country's dairy cows are inseminated through the corporation's artificial breeding programme, including those on Trevor Aitchison's farm on the Hauraki Plains. In his new rotary shed, the cows step onto a slowly turning platform and have the cups attached—here by Trevor's son Karl. When the cows have completed the circuit the cups are removed automatically, enabling Karl to milk 600 cows singlehandedly in an hour.
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