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Grigg¡¯s reagent (acidified ammonium oxalate) has been recommended
as an extractant for evaluating the fraction of soil heavy metals available
to wheat plants

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weiwei1983(½ð±Ò+1): 2010-03-29 18:34
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weiwei1983

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Originally posted by weiwei1983 at 2010-03-29 15:30:03:
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slowstar

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weiwei1983(½ð±Ò+1): 2010-03-29 18:34
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