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SOIL EROSION ASSOCIATED WITH AN UPLAND FARMING SYSTEM UNDER POPULATION PRESSURE IN NORTHEAST INDIA
Author(s) -
Prokop P.,
Poręba G. J.
Publication year - 2012
Publication title -
land degradation and development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.403
H-Index - 81
eISSN - 1099-145X
pISSN - 1085-3278
DOI - 10.1002/ldr.2147
Subject(s) - erosion , environmental science , plateau (mathematics) , agriculture , deposition (geology) , grassland , population , land use , land degradation , soil conservation , shifting cultivation , soil retrogression and degradation , agroforestry , hydrology (agriculture) , soil water , agronomy , geography , structural basin , soil science , geology , ecology , biology , mathematical analysis , paleontology , demography , mathematics , archaeology , geotechnical engineering , sociology
ABSTRACT Rapid increase in population and growing demand for agricultural products has generated changes in land use and upland farming systems and resulted in erosion and land degradation over large tracts of northeast India. The spatial variation of soil erosion rates was studied, in a small catchment under a modified form of shifting cultivation on the hilly Meghalaya Plateau, using the 137 Cs technique. Soil erosion and deposition patterns are much influenced by land use. The estimated annual soil loss from cultivated fields ranged from 32 to 79 Mg ha −1  y −1 and reached only 0·5 Mg ha −1  y −1 from degraded grassland. Calculated soil erosion rates from cultivated fields exceed that which can be produced by weathering of new soil from parent materials. Observed intensification of agricultural production will lead to progressive conversion of cultivated fields into degraded grasslands and other changes to land use in the upper part of the Meghalaya Plateau. Copyright © 2012 John Wiley & Sons, Ltd.

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