Glossary of Irrigation Terms

The means by which nutrients are applied to the landscape via an irrigation system. For example irrigation water can be diverted to a tank of fertilizer where it dilutes the product and then rejoins the pipeline. 

Friction factor is used when calculating the pressure loss in an irrigation system caused by friction. This friction can be between the water and the inner surface of the pipes, and is influenced by factors such as the length and diameter of the pipes, as well as the material used and the inclusion of fittings such as tee or elbow joints