Editing Soil structure (section)

===Granular===<!-- This section is linked from [[Seedbed]] -->
{{uncited section|date=June 2023}}
In the granular structure, the structural units are approximately spherical or [[Polyhedron|polyhedral]] and are bounded by curved or very irregular faces that are not casts of adjoining peds. In other words, they look like cookie crumbs. Granular structure is common in the surface soils of rich [[grasslands]] and highly amended garden soils with high [[organic matter]] content. Soil mineral particles are both separated and bridged by organic matter breakdown products, and [[soil biota]] exudates, making the soil easy to work. [[Tillage|Cultivation]], [[earthworms]], [[frost action]] and rodents [[bioturbation|mix]] the soil and decrease the size of the peds. This structure allows for good [[porosity]] and easy movement of air and water. This combination of ease in [[tillage]], good moisture and air handling capabilities, and good structure for planting and [[germination]], are definitive of the phrase ''good tilth''.