Based on field investigation and indoor analysis, the results showed that there are four soil groups in losses hilly and gully area: ust alluvic entisols, tur anthric entisols, los orthic entisols and red orthic entisols.

• 通过野外调查和室内资料分析表明 ,黄土丘陵沟壑区土壤可划分为扰动人为新成土、干润冲积新成土、黄土正常新成土和红色正常新成土 4个土类 ;