W. L. Newnham, chair of the Soil and Rivers Control Council from 1942 until 1957, talks about the impact of farming and bush clearance on millions of acres of the New Zealand landscape. One of the solutions he proposes is to plant trees to prevent soil erosion on steep hill country.
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Archives New Zealand - Te Rua Mahara o te Kāwanatanga
Reference: Chairman's speech on soil conservation. National Film Unit, 1950
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