# Her prostitution was nothing to her

"She did not care about her prostitution" or "She was not ashamed of her prostitution"

# she defiled the land

"she made my land no good". This represents making the land unacceptable to God. 

# she committed adultery with stones and trees

Here "stones" and "trees" represent the stone and wood material that was used to create idols. The people's idol worship is spoken of as if they were committing adultery.