1. A large cluster or grouping of soil particles, typically larger than 0.25 mm in diameter, formed by the binding of smaller particles through organic matter and mineral cements.
Usage: technical; soil science

Examples

• Macroaggregates in healthy soil improve water infiltration and root penetration.
• The formation of macroaggregates depends on the presence of organic matter and biological activity.
• Soil scientists measure macroaggregate stability to assess soil quality.
• Tilling can break down macroaggregates and reduce soil structure.
• Macroaggregates provide pore spaces that allow air circulation in the soil.