The cleaning of drain tubes depents on the following points:
The following guideline should be executed after a wet period with lots of rainfall, preferably in the autumn.
With the following parameters:
In grasslands, cornland and arable land this drainage should be 7 millimetres (please note that this is for one-sided drainage pipes). When the drainage is less than 7 millimetres, the position of the drain pipes should be considered. When the position is correct, the drainage system has to be cleaned. Execute this step for multiple drainage pipes to determine an average for one field.
It is recommended to clean drainage systems in wet periods when drain pipes can convey water themselves. For profound agricultural knowledge and advice concerning the use and maintenance of drainage systems, one should consult relevant authorities and/or literature.