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By Kim H. Tan

The box of humic subject study has passed through drastic alterations in thoughts and rules because the first variation of Humic subject in Soil and the surroundings: ideas and Controversies was once released greater than a decade in the past. nonetheless the one booklet of its variety in particular addressing humic acid rules and controversies, the Second Edition provides the latest advances in humic acid technological know-how. 11 new and rewritten chapters exchange the unique 9, with up-to-date fabric representing smooth humic acid chemistry. This comprises the delineation of natural subject, humus, and humic matter.

The publication starts by means of contemplating natural topic as an entire, describing terrestrial and aquatic natural topic. It examines humus as a mix of humified and nonhumified natural topic, focusing additionally at the significance of the nonhumified fraction—plant biopolymers of their unique or a bit of decomposed forms—as uncooked fabrics for formation of the humic fraction. The booklet then provides recommendations of humic subject, often called humic acid, overlaying a number rules from conventional perspectives of biopolymers to the most recent ideas according to micellar, supramolecular, and nanotube chemistry. the writer offers the foremost pathways of humification and discusses humification theories. He additionally examines the extraction, isolation, and fractionation of humic matter.

The booklet experiences the chemical composition and version constructions of humic acids, the chemical and spectroscopic characterization of humic ingredients, and the electrochemical houses of humic subject. It additionally addresses the agronomic, environmental, and commercial (including pharmaceutical) value of humic topic. This revised and up-to-date variation keeps the culture of supplying entire assurance of the genesis, extraction, houses, and affects of humic matter.

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Additional resources for Humic Matter in Soil and the Environment: Principles and Controversies, Second Edition

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Dr. Tan earned an MS degree (1955) in agronomy from the University of Indonesia and graduated with a PhD (1958) in pedology under Dr. Ir. J. Van Schuylenborgh, past deacon of the subfaculty of the University of Amsterdam, Amsterdam, the Netherlands. After postdoctoral training at North Carolina State University, Raleigh, North Carolina, and Cornell University, Ithaca, New York, under the tutorship of Drs. Ralph McCracken, Adolf Mehlich, Marlin Cline, and Michael Peech, he returned to the University of Indonesia, where, as the head of the Department of Soil Science, he contributed in the founding of the Agricultural University at Bogor, presently known as IPB (Institut Pertanian Bogor).

Xxix Author Kim Howard Tan is professor emeritus at the Department of Crops and Soil Science, University of Georgia, Athens, Georgia, United States, where he has taught basic soils, soil chemistry, advanced soil chemistry, and methodology of soil and plant analysis for more than 25 years. Since his retirement, he has been invited to teach soil chemistry and environmental soil science at various universities overseas, and was a Fulbright Visiting Professor at the Universidad Nacional del Sur, Argentina, in 2002.

2003; Thomas, 1997; Stephens, 1968). As indicated earlier, the dissolved fraction or DOM comprises only a small part of the total mass of AOM; yet, in the form of dissolved material, it is the most mobile organic fraction. Therefore, DOM is more likely to affect easily a great number of reactions occurring in the aquatic environments. 3, it is also believed to produce undesirable disinfection by-products, making water unfit for drinking or other domestic application. Claims abound in the literature of DOM functioning as a carbon sink, and as such may have an important role in the global carbon cycle.

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