Soil ingestion rates were determined using four 350-kg esophageal fistulated heifers. Soil concentrations in feces, as indirectly by titanium analysis, averaged 14 and 20% June and August, respectively. Calculated soil ingestion rates 0.73 and 0.99 kg/animal-day for the two respective periods.
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Mayland et al. (1977) studied this question.
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