Mechanical and engineering section: A me
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William E Bullock
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Article
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1914
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Elsevier Science
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English
โ 59 KB
## SECTIONS 451 A description was given of the gradual chemical decomposition of animal and vegetable matter in the soil with the formation of a great number of organic compounds, some toxic to plant life, others exerting a highly favorable influence on plant growth. The methods of isolation of th