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pregnant animals are me most susceptible to nitrate poisoning.
“Livestock producers should be aware of the potential for nitrate poisoning,” said Charlie C. Stallings, Extension dairy scientist. “They should be especially careful with com, sorghum-sudangrass, pearl and foxtail millet and alfalfa haylage.”
Pastures fertilized with normal amounts of nitrogen are not usually a threat, although they can become dangerous under stress conditions. Grasses are much more likely to accumulate nitrates than legumes, said White.
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