It may be doubted whether there are many other animals which played so important a part in the history of the world,as have these lowly creatures. Darwin of earthworms. There have been many studies on earthworms since Darwins observations. There are many Famlies of earthworms. Also microbes play an important part of an earthworms diet, and earthworms even prefer organic matter with high concentrations of microbial life.
Some researchers suggest that some microorganisms are essential to earthworms.
If moisture is not available they will dig deep into the soil to find it. The water uptake is related to surrounding temperature. For sake of simplicity and because these three effects are so closely related let us consider the biological,chemical,and physical effects of earthworms on their environment together. The effects of earthworms on crop production vary widely from test to test. This not only because of species,crip,and soil type but also the weather conditions at the time of test.