soil proportion是什么意思

用法例句

An attempt had been made to estimate the soil organic carbon contents and soil proportion under two typical land-use types including pine forest and corn field located at the boundary between the Yellow Sea and Bohai in southern Lvshun.

采样分析位于黄渤海分界线的旅顺南端丘陵山地松树林、玉米田两种土地利用方式下0~50 cm土壤有机碳含量与土壤比重。