also: どかい
noun
lump of earth; clod
Refers to a solid piece of soil, often found in fields or gardens.
畑で大きな土塊を見つけた。
I found a big lump of earth in the field.
土塊を砕いて土を柔らかくする。
Break up the clods to soften the soil.
Mixed kanji-kana spelling; common in everyday writing.
土 is the general word for soil or earth, while 土塊 specifically means a lump or clod of earth.
Compound of 土 (tsuchi, 'earth') and 塊 (kure, 'lump'). The reading どかい is the on'yomi of the kanji.