The book The Soil in Relation to Health was written by author Miers, Henry Alexander, Sir, 1858- Here you can read free online of The Soil in Relation to Health book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Soil in Relation to Health a good or bad book?
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Alkalinity, aeration, moisture and a temperature of about 36°C. (96°F.) are the most favourable conditions. Alkalinity is, as a rule, due to the salts of lime and potash, while suitable aera- tion and moisture are best provided by a loose porous soil. We have dealt with the nitrifying organisms at some length because they illustrate the fact that processes constantly taking place in the soil, and formerly supposed to be entirely of an inorganic nature, are in reality due to the life processes o...f vege- table microphytes. In this connection we may refer the reader to the remarks on p. 21 concerning the weathering of rocks. Undoubtedly most of the bacterial forms inhabiting the superficial layers of the soil are non-pathogenic, that is to say quite incapable of causing disease in man ; nevertheless it has within the last few _years been shown that certain pathogenic micro-organisms, that is to say organisms which produce disease and which can live in the tissues of the body, have their II HUMUS AND MICRO-ORGANISMS 35 primary habitat in the superficial layers of the soil ; whilst others are capable, at any rate during part of their existence, of finding a suitable nidus there ; and in this way a relation exists between the soil and certain diseases.
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