drainage system
system by which the water level on or in the soil is controlled to enhance agricultural crop production
en-GB/ˈdɹeɪnɪd͡ʒ ˈsɪstəm/
en-US/ˈdɹeɪnɪd͡ʒ ˈsɪstəm/
system by which the water level on or in the soil is controlled to enhance agricultural crop production