What is manure from earthworms commonly called?

Manure from earthworms is commonly referred to as castings. Castings are the nutrient-rich waste products released by earthworms after they consume organic matter in the soil. This process aids in the breakdown of organic materials, converting them into a form that is more easily absorbed by plants.

Earthworm castings are highly beneficial for soil health as they enhance soil structure, increase moisture retention, and provide a diverse array of nutrients vital for plant growth. They also contain beneficial microorganisms that further enrich the soil.

In contrast, compost refers to decomposed organic material created through the composting process, which may involve various organic waste but is not exclusively derived from earthworms. Fertilizer is a broad term for substances that provide nutrients to plants, which can include chemical, organic, or natural sources but does not specifically denote earthworm byproducts. Humus is the stable, organic component of soil derived from the decomposition of plant and animal material, and while it contributes to nutrient availability and soil structure, it is not the direct product of earthworm activity.