A plow breaks and turns the soil before planting, read as preparation and fresh beginnings. Dream books link it to hard groundwork that comes before any harvest.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.