noun
crumbly black topsoil; loam soil
Refers to a dark, crumbly topsoil, especially from weathered volcanic ash. Used in agriculture and soil science.
See also: 黒ぼく
この地域の黒ぼく土は野菜栽培に適している。
The crumbly black topsoil in this area is suitable for growing vegetables.
火山灰が風化してできた黒ぼく土
The crumbly black topsoil formed from weathered volcanic ash drains well.