Abstract: An adaptor to allow a farm implement guide system to be used with a pull-type implement to keep a row-crop planter or cultivator properly in the desired row even though the pulling tractor becomes somewhat misaligned. The adaptor is inserted between the tongue of the implement which normally is elongated to allow clearance for tractor wheels when the implement is turned sharply and the machine itself so that relatively large misalignment may be corrected. The distance between the implement and the adaptor is kept as short as possible.