CCC 1085Â±3278/99/020177Â±05$17.50 Copyright # 1999 John Wiley & Sons, Ltd. baseline for derived maps of climatic data, despite signiÂ®cant changes since in the extent and nature of the database. Elsewhere, however, the material is commendably up to date. Section 2 focuses speciÂ®cally on Africa, and here many of the regional maps have better deÂ®nition than the Â®rst edition, reÂ¯ecting a scale increase from 1 : 90 m to 1 : 81 m. The general structure is similar to that of Section 1, with successive maps (with explanation) derived from GLASOD databases of soil degradation severity, water erosion, wind erosion, soil chemical deterioration, soil physical deterioration, and causes of soil degradation and vegetation. The textual explanation is good, and the limitations of the various maps are properly presented. A new Section 3 incorporates a number of methodological developments in the Assessment of the Status of Human-induced Soil Degradation in South and Southeast Asia (ASSOD). In this survey, greater emphasis is placed on generating country-scale assessments and on the impact of desertiÂ®cation on agricultural productivity. The entire ASSOD database has been accessed and summarized. The resulting continental-scale maps do not do justice to the country-scale approach, though some useful textual
Land Degradation and Development – Wiley
Published: Mar 1, 1999
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