Abstract: There is presented a row marker adapted to be used with a tractor carrying seed-dispensing hoppers and having an hydraulic system and having a tool bar carried by the tractor for movement over the ground. The row marker comprises a frame for mounting on one end of the tool bar and carrying a pivoted first arm portion of the marking arm for oscillation between a substantially horizontal working position and a substantially vertical carrying position. A second arm portion of the marking arm has one end pivotally attached to the outer end of the first arm portion at a pivot shaft for oscillating movement between a generally vertical carrying position close to the first arm portion and a generally horizontal working position in alignment with the first arm portion in its working position. A marking element, such as a disc, is attached to the outer end of the second arm portion.