Question

Why are holes made in the soil

Answer 1

Answer:

Sinkholes are cavities in the ground that form when water erodes an underlying rock layer. ... The second type forms when water dissolves the rock underneath soil and creates an underground chasm. Without rock to support it, the soil layer collapses and creates a hole on the surface

Answer 2

Answer:

Explanation:

Holes throughout the lawn are usually sourced to small rodents, like voles or moles, or insects. Some wasps and other insects lay eggs in sod, which produces holes. It might be beneficial to excavate small holes in yards to see if there are eggs or if there is a tunnel.

There are two main reasons:

1. most soil is full of organisms, many of which create holes (actually in most cases tubes) as they push their way around - whether these are the holes formed by the decay of old roots or the pores created by worms as they move and feed (and a range of similar biological processes at larger and smaller scales).

2. Soils containing some clay and/or organic matter (which is most of them) expand and contract as they wet and dry. This, plus the action of soil organisms, creates a fine topsoil structure of soil blocks or peds - granular peds at the very surface with increasingly large, blocky peds further down. This creates a lot of space for air, as the peds contract under drying conditions, which makes the surface feel soft. Add a good amount of organic matter and the soil surface can feel positively spongy.