noun which may take the genitive case particle 'no'
with soil on; unwashed (vegetables)
Describes vegetables, root crops, or other produce that still have dirt clinging to them, often implying freshness or just-harvested state. Used attributively with の.
土付きの大根は新鮮でおいしい。
Unwashed daikon radishes are fresh and delicious.
八百屋で土付きのごぼうを買った。
I bought some burdock root with soil still on it at the greengrocer's.
Similar meaning, but 泥付き emphasizes muddiness, while 土付き simply means soil is attached.
Compound of 土 (tsuchi, 'soil') + 付き (tsuki, 'attached').