The Geology of the Country Round Banff, Huntly and Turriff PDF Download
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Author: Herbert Harold Read
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 260
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Author: Herbert Harold Read
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 260
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Book Description
Author: Bruce Duff Mitchell
Publisher:
ISBN:
Category : Soil surveys
Languages : en
Pages : 258
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Book Description
Author: J. Tinsley
Publisher: Springer Science & Business Media
ISBN: 9400961014
Category : Nature
Languages : en
Pages : 409
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Book Description
The success of shifting cultivation systems developed by subsistence farmers testifies to the resilience of the "natural" soil-plant ecosystems to recover from the offtake of nutrients in crops and loss of soil struc ture. By contrast, the development of intensive cropping systems requires large inputs especially of nitrogen, together with phosphorus, sulphur and other essential elements in order to maintain the nutrient levels needed for abundant crop yields. As Dr. Cooke ably pointed out in his introductory lecture, the dis coveries and experiments of the 19th century encouraged farmers in temperate zones to rely greatly on chemical fertilizers supplements. However, the work of Charles Da{win on soil mixing by earthworms and the discovery by Hellriegel and Wilfarth in 1886 that the nodules on legume roots contain colonies of symbiotic bacteria able to "capture" atmospheric nitrogen molecules to the benefit of the host plant heralded a growing realization of the importance of soil biota in fertility studies. Biological fixation of nitrogen has been the theme of many meetings and publi~ations hitherto but at this Conference, convened on the delightful campus of Reading University, attention was mainly focussed on other biological processes in soil fertility. These Proceedings record the dominant themes and include six keynote addresses delivered at plenary sessions and seven introductory lectures to paper reading sessions by invited individuals plus 22 of the proferred papers, in six sections as tabled in the contents list.
Author: K.S. Richards
Publisher: Routledge
ISBN: 1000046303
Category : Science
Languages : en
Pages : 478
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Book Description
Soils and sediments influence current processes, preserve evidence of past processes, indicate evolutionary phases in landscapes and provide a basis for relative and absolute chronologies. They provide an important key to the integration of short-term process studies and investigation of longer-term landform evolution. This book, first published in 1985, has been arranged to provide wide temporal and spatial coverage, with studies ranging from historic to geologic time scales and micro- to macro-spatial scales. The interdisciplinary nature of the subject is reflected in contributions from soil scientists, engineering geologists, hydrologists and geomorphologists.
Author:
Publisher: Elsevier
ISBN: 0080869793
Category : Science
Languages : en
Pages : 427
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Pedogenesis and Soil Taxonomy : The Soil Orders
Author:
Publisher:
ISBN:
Category : Arid soils
Languages : en
Pages : 340
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Author:
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 348
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Author: Great Britain. Soil Survey Research Board
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 62
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Author:
Publisher:
ISBN:
Category : Soil surveys
Languages : en
Pages : 360
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Author: Soil Survey of England and Wales
Publisher:
ISBN:
Category : Soil surveys
Languages : en
Pages : 28
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Book Description
