West limestone dry stone mountain, central as the Loess Plateau hilly region and the Taiwan area, the eastern plains area, 731-1716 m above sea level in between.
西部为石灰岩干石山区，中部为黄土丘陵区和台塬区，东部为平原区，海拔高度在731-1716米之间。
So the grass, and arbor vegetation should be rehabilitated and developed quickly in order to decrease soil erosion in Hilly-gully region of Loess Plateau, and then decrease soil nutrients loss.
因此，该地区要注意建设和恢复草、灌植被，使之尽快起到水土保持作用，近而减少土壤养分流失。
Comparison of dryland potential yield increase in gully and hilly regions of Loess Plateau shows that potential yield increase in hilly region is 117.6%, and only 56.6%in gully region.
在黄土台塬区和丘陵区中，丘陵区的粮食增产潜力较台塬区大，前者尚有117.6 %增产能力，后者仅56.6%。
The city of Yan'an, is located in the hilly loess plateau region, while the long and narrow watercourse makes lots of trouble in the process of city construction.
延安处于黄土高原梁峁地区，川道狭长的缺点，给不断扩大的城市建设带来了诸多不利。
Hippophae rhamnoide is a nicer shrub species for plantation becoming savageness. This population could renew very well in Hilly-gully region of Loess plateau.
研究结论如下： 沙棘是一个良好的人工林天然化灌木物种，在黄土丘陵区该种群更新良好。
The characteristics of soil aggregates fractal dimension and its responses to vegetation rehabilitation were studied in the Hilly-gully region of Loess Plateau.
采用计算分形维数的方法，对黄土丘陵区典型草原带土壤团聚体的分形特征及其对植被恢复的响应进行研究。
The characteristics of soil aggregates fractal dimension and its responses to vegetation rehabilitation were studied in the Hilly-gully region of Loess Plateau.
采用计算分形维数的方法，对黄土丘陵区典型草原带土壤团聚体的分形特征及其对植被恢复的响应进行研究。
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