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1997
Effect of nitrogen fertiliser and concentrate feed on dairy production., NA Thomson, RJ Johnson, J Clough, and DA McCallum , Proceedings of the New Zealand Society of Animal Production, Volume 57, p.172-175, (1997) , (Full PDF)
1994
The effect of different perennial ryegrass cultivars on dairy animal performance, DA McCallum, and NA Thomson , Proceedings of the New Zealand Society of Animal Production, Volume 54, p.87-90, (1994) , (Full PDF)