in
1.
to mix soil with another substance by digging the two substances together :
The manure should be well dug in.
2.
to push sth into sth else :
He dug his fork into the steak.
DIG STH
Meaning of DIG STH in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005