Fertiliser on the rocks
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en
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CTA. 2002. Fertiliser on the rocks. Spore 97. CTA, Wageningen, The Netherlands.
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Abstract/Description
Manure or compost are cheaper alternatives to commercial fertilisers, but you might be sitting on top of another one in your land, just waiting to be activated: inorganic phosphorous rock.Using the rock is in itself not new. In factories all around...