1 Nature of earthworms
Earthworms are harmless creatures. They are known as the farmer's friends as they are beneficial for the soil. Earthworms help in supporting plant growth by breaking down the dead and decaying organic matter into rich humus soil. These creatures breathe through their skin and help improving aeration to the soil.
2 Direct exposure to sunlight
You might have noticed that Earthworms do not come, especially during the daylight, when the sunlight is quite bright. This is because their skin is vulnerable to direct sunlight. Earthworm's skin gets dried up, and if it is exposed to sunlight, it may be adversely affected. That's why they dig deep holes and stay underground and only come out in the rain to survive outside when it's not too sunny.
3 Moist surface
Earthworms are fond of moist surfaces or soil. The reason is evident as they feel smooth and comfortable to move from one place to another. They are also able to travel faster if the soil is wet. Moreover, they will not become dehydrated if they are traveling over the most surfaces.
4 Fewer Predators
While it is raining or after the rain came, it has been noticed that predators are not much visible. The rain causes the soil to become acidic, which reduces the number of predators present near around. This provides the earthworms with a significant opportunity to set up their livelihood in different areas.
5 Other benefits of Earthworms
Earthworms are not merely significant to enhance the soil nutrients but also help prepare the organic compost rich in Nitrogen, Potash, and Phosphorus. This compost is called Vermi Compost.