1, earthworms feed on animal and plant residues in the soil, and often drill holes in the ground to loosen the soil, which makes water and fertilizer easy to enter, improves soil fertility and is beneficial to plant growth. Earthworms can be used as feed for poultry and are the favorite "meat" food for chickens and ducks. Earthworms are also widely used in freshwater fishing and are suitable bait for various waters, fish and climate. \ x0d \ x0d \ 2。 Earthworms are decomposers. For human beings, they can decompose organic wastes produced by human beings and turn them into inorganic substances for plants to use. Therefore, if there are earthworms in the yard, vegetables or flowers will grow better \ x0d \ x0d \ 3. Due to the digging and omnivorous nature of earthworms, the excrement of earthworms can reach tens to hundreds of tons per hectare of land every year. Earthworm manure rich in humus is an excellent fertilizer for plant growth. Earthworm activity can also improve soil, accelerate the decomposition of organic matter in soil, and restore and maintain the ecological balance of soil.