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The aim of this study was to analyze the changes in the area and pattern of farmland in Ningwu County of China's eastern Loess Plateau, using multi-temporal Landsat data, for the periods 1990–2000 and 2000–2010. It was found that (1) the increase in area of farmland from 1990 to 2000 has been a direct result of the rapid population increase in the area; (2) the decrease in area of farmland from 2000...
Because of the absence of natural records with high resolution, the study of environmental changes in arid and semi-arid desert regions, an important component of the global system, lags behind studies in other regions. In this paper, we summarize the literature on the evolution, forms, and profile features of nebkhas (coppice dunes), and discuss the environmental implications of their formation and...
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