Avoid the application of slurry on wet and poorly permeable soil

Earthworms are one of the most important organisms in soil that play an important role in maintaining natural soil processes. Excessive amounts of slurry, which contains a high proportion of nitrogen in the form of ammonia, such as ammonium sulfate and some manures, can reduce the number of earthworms in the soil. Harmful effects on earthworms can be reduced by avoiding the application of slurry on wet and poorly permeable soil.