Soil Aeration
Sand vs Soil
The main difference between the two is that, the soil has pores which allow the water and nutrients to be held, whereas the soil is loose, grainy and does not have pores to hold water or nutrients. |
Earthworm vs Leech
Earthworms and Leeches are hermaphrodites, but differ in their subclasses; Earthworms fall under sub class Oligochaeta, whereas Leeches fall under Hirudinae. |