Kim H. Tan's Humic Matter in Soil and the Environment: Principles and PDF

Environmental Studies

By Kim H. Tan

ISBN-10: 0824742729

ISBN-13: 9780824742720

The one publication to totally outline and discover the genesis, extraction, homes, and influence of humic subject on agriculture, undefined, and the surroundings, Humic topic in Soil and the surroundings delves into the problems and controversies linked to produced and traditional humic compounds. It assesses the function of humic elements in medicinal drugs, fertilizers, and commercial and pharmaceutical operations, delivering attribute obvious gentle, infrared, ESR, NMR spectra, and electron micrographs for each humic compound. unprecedented in scope and intensity, this reference examines controversies concerning humic subject as a true or fake compound and identifies traits and customers for the future.

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Extra resources for Humic Matter in Soil and the Environment: Principles and Controversies (Books in Soils, Plants, and the Environment)

Sample text

5 M NaOH (Tan, 1995; Pierce and Felbeck, 1975), decreasing in this way the chances for harmful alterations. 1 M NaOH. By rule it is known, that the stronger the NaOH solution the more will be extracted, but the greater will be the chances for chemical changes to occur in the extracted humic matter. Sodium pyrophosphate, Na,P,O,, although not as effective as NaOH, is used frequently for the extraction of humic matter from soils TM Copyright n 2003 by Marcel Dekker, Inc. All Rights Reserved. MARCEL DEKKER, INC.

Another type of waste containing humic matter is sewage sludge, produced in amounts even more enormous than poultry manure. The figures reported by Larson and Schuman (1977) of 5,680 m3of sewage sludge barged daily from Chicago, IL, to its dumping site, and 5,450 m3of raw sludge transported daily by gravity through open ditches to landfills in Melbourne, Australia, demonstrate the colossal dimension of production. Sludge, as a reservoir of humic substances, attracted considerable research attention during the period of 1970- TM Copyright n 2003 by Marcel Dekker, Inc.

1991). Since spodosols are very acidic soils, conditions favoring dissolution of large amounts of Fe and Al, the humic substances are mostly in the form of Fe- and Al-humates and hlvates. The oxisols of the humid tropics are notorious for their low organic matter contents, with contents often reported to be as low as 1%organic carbon. However, the lowest organic matter contents are detected in aridisols, soils of the arid regions and the sandy soils in the deserts. Because of deficiency of water, biomass formation and decomposition reactions in these dry regions are very limited.

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Humic Matter in Soil and the Environment: Principles and Controversies (Books in Soils, Plants, and the Environment) by Kim H. Tan

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