To what does Darwin compare earthworms? What does he say about the history of both in regard to ploughing the soil

Answer 1

Darwin compares earthworms to ploughs, saying that they play a similar role in mixing and fertilizing the soil. He notes that both earthworms and ploughs have a long history of being used in agriculture, with earthworms having been at work in the soil for countless generations before humans began ploughing the land. Darwin highlights the importance of earthworms in enhancing soil fertility and structure, and suggests that their impact on the soil should not be underestimated.