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What's all this about the phosphorus requirements of Minnesota's crops? It looks like a direct copy paste from somewhere... I'll remove it as it doesn't really do anything for the article. 71.224.136.30 ( talk) 21:14, 17 September 2009 (UTC) reply

the (second) link in "further reading" that claims to take you to a manufacture and production chart currently redirects to a malicious website. 157.211.78.17 ( talk) 02:11, 19 February 2023 (UTC) reply

Thanks 157.211.78.17. I have removed the link. Graeme Bartlett ( talk) 02:22, 19 February 2023 (UTC) reply