Bull Sterility.
The problem of sterility in cattle is world-wide but not necessarily due to the same cause in all countries. Many theories have been put forward, one being that sterility of the bull is nutritional in New Zealand and due to the high protein content of young grass. At Ruakura, 24 bulls in four groups of six have been placed on rations differing widely in their protein and starch content. One group forms a control - lot run under farm conditions. The second group is being fed a high starch ration, a third group is receiving a high protein diet and a fourth group is being raised under the stalled conditions as at present in Britain. The young bulls were placed on their experimental rations at five months of age and will be maintained under such conditions until they a,re at least three years old.
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https://paperspast.natlib.govt.nz/newspapers/WAITA19380426.2.17
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Wairarapa Times-Age, 26 April 1938, Page 3
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145Bull Sterility. Wairarapa Times-Age, 26 April 1938, Page 3
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