Soil is any surface layer present in the crust of planet Earth, consisting of minerals and organic material from the decomposition of living things. It has a fundamental role in plant nutrition, being essential also for agricultural activity.
The soil may be permeable or impermeable.
Permeable soil is one that allows water particles to penetrate easily, with no water retention. Examples are sandy soils, which through their high porosity have little resistance to water ingress.
