noun
volcanic ash soil
Technical term used in geology, agriculture, and soil science. Refers to soil formed from volcanic ash, often with specific properties like high water retention.
この地域の火山灰土は農業に適している。
The volcanic ash soil in this region is suitable for agriculture.
Compound of 火山 (kazan, 'volcano') + 灰 (hai, 'ash') + 土 (do, 'soil').