What does Leviticus 26:20 mean?

If you keep fighting against me, all your hard work will feel pointless. The land won’t give you good crops, and the trees won’t bear fruit, no matter how much effort you put in. Leviticus 26:20 - Modern Text Bible

(God warns that if the people keep resisting him, their efforts will be wasted. Even their best work won’t pay off because the land itself will stop producing.)