In the Quincy-Pasco subunit where irrigated farming predominates, most soil erosion is caused by runoff of excess irrigation water from cropland.
(irrigated farming; predominates; L:the Quincy-Pasco subunit) (most soil erosion; is caused; by runoff of excess irrigation water from cropland; T:In the Quincy-Pasco subunit)
irrigated farming most soil erosion
predominates is caused
L:the Quincy-Pasco subunit
by runoff of excess irrigation water from cropland T:In the Quincy-Pasco subunit