The Formation of Vegetable Mould Through the Action of WormsNote 131 — Chapter III · THE AMOUNT OF FINE EARTH BROUGHT UP BY WORMS TO THE SURFACE.Reading editionS. W. Johnson, ‘How Crops Feed,’ 1870, p. 139.◇Copy noteReturn to CHAPTER III. THE AMOUNT OF FINE EARTH BROUGHT UP BY WORMS TO THE SURFACE.