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_aSoil Science Society of America. Madison, Wis. _9108304 |
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| 245 | 0 | _aSoil fertility and organic matter as critical components of production systems | |
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_aMadison, Wis : _bThe Society, _c1987 |
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_a166 p. _b; gráfs. |
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_aSSSA Special publication _v; 19 |
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_aSuelos _xFertilidad. _9110367 |
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_aSuelos _xMateria orgánica. _9110429 |
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_aSSSA Special publication _v; 19 |
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