短语词组短语loam sandy soil 壤质砂土loam paddy soil 壤水稻土medium loam soil [土壤]中壤土boulder loam soil 漂砾壤土sandy loam soil 亚砂土又称砂壤土;沙壤土light loam soil [土壤]轻壤土fibrous loam soil 松软壤土silty clay loam soil 粉粘壤土sand loam soil 砂壤土 返回 loam soil