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salt on grass



There was an article in Hoard's Dairyman a month or so ago, referred to
some Brits putting NaCl on high-K grass land, reduced forage K levels.
Since high K grass is a hot topic in dry-cow dairy circles, I've had 
several questions about this. Any news or opinions out there. Since
the problem isn't strictly a K problem but a cation problem, and since
Na is also a cation, seems like it wouldn't help unless the grass
doesn't take up the Na. Also, isn't high-Na tough on soil structure.
I think the article mentioned a 45#/A NaCl rate. Any opinions, etc?




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