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IV.—Dust and Soils
Published online by Cambridge University Press: 01 May 2009
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In Darwin's recently published work on vegetable mould, allusion is made to the fact that “In countries where the summer is long and dry, the mould in protected places must be largely increased by dust blown from other and more exposed places.” A few lines further on, however, he states that “In humid countries like Great Britain, as long as the land remains in its natural state clothed with vegetation, the mould in any one place can hardly be much increased by dust.” To this statement no exception can be taken, if we remember that it only applies to a period when the climate is humid, and to a country clothed with vegetation.
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References
page 165 note 1 Darwin, , The Formation of Vegetable Mould through the Action of Worms, pp. 236, 237.Google Scholar
page 165 note 2 Johnston, and Cameron, , Elements of Agricultural Chemistry and Geology, 13th edition, p. 90.Google Scholar
page 167 note 1 There is very little sandy land in other directions.
page 167 note 2 See however Proctor, “Pleasant Ways in Science,” p. 379; von Richthofen, “China,” vol. i.; and von Richthofen, “On the Mode of Origin of the Loess,” Geol, Mag. Dec. II. Vol. IX. p. 293.
page 167 note 3 See also Johnston, and Cameron, , op. cit. p. 191.Google Scholar
page 168 note 1 op. cit.
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