11. In his last book, he returned to the effect earthworms have on soil formation . 12. The soil formation continues and its moisture content increases. 13. The gabbro soil formation dates from 175 million years ago during the late Jurassic Period. 14. Pedodiversity is a measure of soil variation, and pedodiversity is a function of soil formation . 15. The fact that soil formation is simply not occurring makes ecologically sustainable management even more difficult. 16. Profile development is minimal as a consequence of young age and / or slow soil formation . 17. Plants, animals, fungi, bacteria and humans affect soil formation ( see soil biomantle and stonelayer ). 18. Some species of this genus are known to be important in the process of soil formation . 19. Much of the bright coloration of the Chinle is due to soil formation during the Late Triassic. 20. His charming, intelligent, and cultured cousin soil formation , which Darwin presented at the Geological Society on 1 November.
