軽けい鬆そう土ど

noun

loam; humus

Refers to fertile, well-structured soil rich in organic matter, often used in agriculture and gardening.

• この畑はたけの軽けい鬆そう土どは野や菜さい作づくりに適てきしている。

  The loam in this field is suitable for growing vegetables.

noun

soil from fine volcanic ash

Specifically denotes soil formed from fine volcanic ash, often found in volcanic regions; a more specialized geological term.

• 軽けい鬆そう土どは火か山ざん灰ばいが風ふう化かしてできた土ど壌じょうです。

  Keisōdo is soil formed from weathered volcanic ash.