On Thu, 11 May 2000 09:55:41 -0700, Diane Cooner wrote:
>about a local dairyman who lost some cows after he turned them loose in the
>early spring to graze in a field that annually floods. The area is part of a
>lagoon system that can be under water for up to a month solid every winter
>due to flooding. Apparently a number of cows died from eating the first
>growth forage in the field because it had a high level of nitrites (as
>opposed to nitrates) due to the anaerobic winter conditions, and the nitrite
>level proved toxic to the cows.
Could also have been a grass tetany problem related to low magnesium
levels in lushly growing spring forages.
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