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"Phil L" wrote in message ... Arjen wrote: :: There is now a test for sale at eBay to test the level of Active :: Organic Matter in your soil. The more active OM - the better; :: excellent for organic farmers and growers, or for your allotment. :: See: They're not really of any use for gardeners or farmers - they are primarilly used by civile engineers and construction companies to find if any organic matter exists in sand and aggregates prior to using them for concrete etc...organic matter will eventually disintegrate, thus leaving the concrete severely weakened...of little importance for a garden path, but immensely important if your building a motorway bridge or multi-storey office block. That is as maybe. What bothers me is what property of "Active Organic Matter" it is which causes it to colour a test liquid. Remember, it must be a property common to *all* "Active Organic Matter", and absent from all other organic matter, or indeed all other matter. Franz |
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