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| Utgitt
| Madison, Wis. : Soil Science Society of America , 1973
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| Omfang
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| Opplysninger
| "Held on August 16, 1971, during the annual meeting of the Soil Science Society of America and American Society of Agronomy. Sponsored by divisions S-5, A-3, S-1, S-6, and S-7 of the societies.". - Includes bibliographies.
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| Emner
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