By Kim H. Tan

The box of humic subject learn has passed through drastic alterations in thoughts and rules because the first version of Humic topic in Soil and the surroundings: rules and Controversies was once released greater than a decade in the past. nonetheless the one e-book of its sort particularly addressing humic acid rules and controversies, the Second Edition provides the most recent advances in humic acid technology. 11 new and rewritten chapters substitute the unique 9, with up-to-date fabric representing glossy humic acid chemistry. This contains the delineation of natural subject, humus, and humic matter.

The e-book starts off by means of contemplating natural subject as a complete, describing terrestrial and aquatic natural topic. It examines humus as a mix of humified and nonhumified natural topic, focusing additionally at the value of the nonhumified fraction—plant biopolymers of their unique or just a little decomposed forms—as uncooked fabrics for formation of the humic fraction. The e-book then provides options of humic topic, known as humic acid, masking more than a few principles from conventional perspectives of biopolymers to the most recent suggestions in keeping with micellar, supramolecular, and nanotube chemistry. the writer provides the foremost pathways of humification and discusses humification theories. He additionally examines the extraction, isolation, and fractionation of humic matter.

The publication experiences the chemical composition and version buildings of humic acids, the chemical and spectroscopic characterization of humic components, and the electrochemical houses of humic topic. It additionally addresses the agronomic, environmental, and business (including pharmaceutical) significance of humic topic. This revised and up to date variation maintains the culture of offering accomplished insurance of the genesis, extraction, homes, and affects of humic matter.

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

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The concept of redox reactions is addressed also as a photochemical reaction, and the concept of reduced and oxidized forms of humic acids addressed as controversial issues. All the above revisions, including those related to the biological properties of soil, improve the first-edition version in terms of both quantity and quality. Chapter 11 is about the environmental and industrial importance, including pharmaceutical, of humic matter. This second-edition version is also revised, rewritten, and expanded considerably, necessitating the author to focus the readers’ attention on only a few major revisions.

Kerogen was discovered in chondrite meteorites and interstellar dust. At the current state of knowledge, the present author has no experience commenting on what the effect is of extraterrestrial organic matter on the formation of humus and humic matter in space and on Earth. Whether kerogen can also be a source for the production of fossil fuel in our galaxy is a matter of speculation. The topic of extraterrestrial organic matter is added only for completeness, with the intention to stir interest from other scientists and professionals.

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).

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