京郊农民群众所普遍习称的:“黄土”,即过去土壤分类中既定的一种淋溶性的褐土型土壤.它广泛地分布在京郊山麓一带,占据太行山东麓和燕山南麓的古老的洪积冲积平原上和河流冲积扇的中下部.在平原上低矮的残丘和高阶地上也有零星的出现,其中以怀柔、密云、平谷、延庆、门头沟、周口店等地分布面积为最广. The peasants in the suburbs are generally accustomed to saying “loess,” a type of leached cinnamon soil that was defined in the past soil classification and is widely distributed in the foothills of the suburbs of Beijing and occupies the eastern foothills of Taihang Mountains and the south of Yanshan The ancient alluvial alluvial plain and fluvial alluvial fan middle and lower parts of the plains in the low residual hillock and high ground there are sporadic appearance, of which Huairou, Miyun, Pinggu, Yanqing, Mentougou, Zhoukoudian and other places with a distribution area of The most widely.