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From the 1950s, more science was applied to farming. These men are being trained as artificial-insemination technicians. Selective breeding using artificial-insemination techniques greatly improved farm productivity.
Te whakamahi i tēnei tūemi
Archives New Zealand - Te Rua Mahara o te Kāwanatanga
Reference: AANR 6325/W3302 Drawer 1
Permission of Archives New Zealand Te Rua Mahara o te Kāwanatanga must be obtained before any re-use of this material.