Janeiro 2009
China
Land degradation resulting from soil salinity is a primary problem in arid farmland. This study clarifies the characteristics and regulation of reclaimed salinized farmlnd in a desert oasis. As a case study, we examined an alluvial fan oasis in the Manas River Valley using fixed position experiments, spacial substitutes, and a trend estimation model derived from principal component analysis.
The world faces unprecedented opportunities to reduce global poverty and improve human welfare. Strong global growth and better economic policies in recent years have substantially reduced poverty in many developing countries.