Isohumusols distributed in depression,while alkalic halosols distributed in depression margin,micro-slope land,and flat land.
洼地发育均腐土,洼地边缘、微坡地和高平地发育碱积盐成土。
Carbon isotopic composition of pedogenic carbonate can be used as an indicator of paleoenvironmental change.
本文对黄土高原地区S1以来成土碳酸盐和红粘土中碳酸盐的碳同位素进行了研究。
