Classification schemes of natural objects seek to organize knowledge so that the properties and relationships of the objects can be most easily remembered and understood for some specific purpose. Ultimately, soil taxonomy and other soil classification schemes seek to make knowledge useful in satisfying the human needs that depend on soils. This book briefly considers the nature and categories of Soil Taxonomy, which was published by the U.S. Department of Agriculture in 1975, and the Canadian System of Soil Classification, published in 1978.
Diagnostic soil horizons are used to classify soils into orders – the highest category. Diagnostic horizons formed at the surface are called diagnostic surface horizons, or epipedons; six horizons are recognized: mollic, umbric, anthropic, ochric, histic, and plaggen. Subsurface diagnostic horizons form below the surface of the soil and, in some cases, just immediately below a layer of leaf litter. Diagnostic subsurface horizons may be exposed by truncation of the soil. The diagnostic subsurface horizons include cambic, argillic, nitric, spodic, oxic and agric.
ABOUT THE AUTHOR A Balakishan
Dr. A Balakishan has obtained his Ph.D. in Geography from Osmania University. He is currently Associate Professor of Geography at the Centre for Indian Ocean Studies, Osmania University, Hyderabad. His areas of interests include- Indian Ocean, Remote Sensing, GIS, Urban and Environmental studies.
ABOUT THE AUTHOR Afzal Sharieff
Professor Dr. Afzal Shariegg did his M.A. in Geography form OSMANIA University. Dr. Sharieff started his teaching career in a secondary school, teaching social studies and geography. Later he was selected as a associate professor in the University. He was promoted as a reader on the basis of his work and promoted as a full fledged professor. Dr. Sharieff has attended many national seminars and workshops. He is a member of many professional bodies and he lectures on geographical issues. He writes for national newspapers and magazines.
ABOUT THE AUTHOR Masood Ali Khan
Dr. Masood Ali Khan obtained his M.A. and Ph.D. in Sociology from Dr. B.R. Ambedkar Marathwada University, Aurangabad. He started his career as UGC Research Fellow, Dept. of Sociology in the same University. Presently he is working as Deputy Director, southern Regional Centre, ICSSR, Osmania University. His area of interest are information Technology in Social Sciences, Minority Problems, Urdu Press and Sociology of Islam. He has published many articles of different nature both in national and international journals. Dr. Khan has conducted more than 50 Seminars, Workshops and Research Methodology Courses sponsored by SRC-ICSSR. A widely travelled person, Dr. Khan has attended many national / international seminars / conferences.
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