同义词： C-horizon
C-horizon母质层;底土层
C-horizon C母质层
HSC C Horizon Scanner水平扫描
C horizon C母质层
sulfuric c horizon含硫层
natric c horizon碱化层
podzolic c horizon灰化层
horizon cC层;母质层
N（名词） the layer of a soil profile immediately below the B horizon and above the bedrock, composed of weathered rock little affected by soil-forming processes 母质层