Read e-book online Amazonian Dark Earths: Origin, Properties, Management PDF

By Johannes Lehmann, Dirse C. Kern, Bruno Glaser, William I. Woods

ISBN-10: 1402018398

ISBN-13: 9781402018398

ISBN-10: 1402025971

ISBN-13: 9781402025976

Darkish Earths are a testomony to vanished civilizations of the Amazon Basin, yet can also resolution how huge societies may perhaps maintain extensive agriculture in an atmosphere of infertile soils. This ebook examines their foundation, homes, and administration. Questions stay: have been they deliberately produced or a spinoff of habitation. extra new and multidisciplinary views by means of prime specialists may possibly pave the way in which for the following revolution in soil administration within the humid tropics.

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Seventeenth and eighteenth century historians, most of whom belonged to the religious orders, wrote frequently of the crops grown by the Indians and of the fact that they cultivated the islands as well as terra firme where they favored slash and burn techniques. Some even commented on the ability of the natives to preserve crops in underground silos on islands in the várzea (Chantre y Herrera, 1901; Acuña, 1942; Magnin, 1998). There are no references that can be construed as the preparation or utilization of ADE.

German, L. A. (2003). Historical contingencies in the coevolution of environment and livelihood: contributions to the debate on Amazonian black earth. Geoderma, 111, 307-331. Gourou, P. (1949). Observações geográficas na Amazônia. Revista Brasileira de Geografía, 11, 355-408. Gross, D. R. (1983). Village movement in relation to resources in Amazonia. B. T. ), Adaptive Responses of Native Amazonians (pp. 429-449). New York: Academic Press. Hartt, C. F. (1874). Contributions to the geology and physical geography of the lower Amazonas.

Before making them Christians, they must be made human” (1986). Not until the end of the eighteenth century was there greater interest in economic activity, and then the focus was primarily upon trade rather than the means of supporting larger populations. Even Humboldt, among the first of the scientific observers, viewed the tropical forest as dominant and man “as a transient guest, who quietly enjoys the gifts of nature” (Humboldt, 1974(1)). 7. EARLY DESCRIPTIONS OF TERRA PRETA, 1874 - 1986 While the existence of terra preta soils was well known to farmers and undoubtedly to Portuguese observers during the colonial period, we do not know of any early published reports before the late nineteenth century.

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Amazonian Dark Earths: Origin, Properties, Management by Johannes Lehmann, Dirse C. Kern, Bruno Glaser, William I. Woods


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